Introduction
Load balancing is one of those infrastructure components that sounds simple — distribute traffic across multiple servers — but becomes surprisingly complex at scale. The choice between load balancers involves decisions about global vs regional distribution, L4 vs L7 processing, health checking strategies, SSL termination points, and integration with the broader security and compute stack.
The four providers take distinctly different approaches. Cloudflare provides DNS-based global load balancing that works across any infrastructure. AWS offers a family of regional load balancers (ALB, NLB, GLB) with a separate global option (Global Accelerator). Azure provides Front Door as a global L7 platform alongside regional options. Google offers a true anycast global load balancer that is arguably the most architecturally elegant.
Understanding these architectural differences matters more than comparing throughput numbers — the right load balancer depends on where your backends are, what protocol they speak, and how globally distributed your users are.
Want a recommendation for your specific workload? Try our free Cloud Load Balancer Selector to compare AWS ALB vs Azure Front Door vs Cloudflare vs Google Cloud Load Balancing and get a tailored pick in seconds.
Architecture Deep Dive
Cloudflare Load Balancing: DNS-Based Global Steering
Cloudflare's load balancing operates at the DNS and proxy layer. When a user requests your domain, Cloudflare's DNS returns an IP that routes to the optimal origin based on health, proximity, weight, and custom rules. The request then passes through Cloudflare's reverse proxy (the same proxy that provides CDN, WAF, and DDoS protection) before reaching the origin.
How it works:
- Origins and pools: You define origin pools — groups of origin servers (IP addresses or hostnames). A pool might be "US-East servers" or "EU production cluster."
- Health monitors: Cloudflare probes your origins from multiple global locations. If an origin fails health checks, it is removed from the pool. If an entire pool is unhealthy, traffic fails over to the next pool.
- Traffic steering: Cloudflare directs traffic to the best pool using configurable policies:
| Steering Policy | Description |
|---|---|
| Off (failover) | Route to the first healthy pool in priority order |
| Random | Distribute randomly across healthy pools |
| Weighted | Distribute by percentage across pools |
| Geo | Route to the nearest pool by geographic region |
| Dynamic | Route based on measured RTT from Cloudflare PoPs to origins |
| Proximity | Route based on geographic distance with configurable bias |
| Least outstanding requests | Route to the pool handling the fewest active requests |
Key characteristics:
- Works with any origin — AWS, Azure, GCP, bare metal, on-premises, or any combination
- Health checks run from multiple global locations simultaneously, detecting region-specific outages
- Integrated with Cloudflare's proxy — failover happens without the user experiencing a DNS TTL delay because Cloudflare's proxy handles the routing internally
- Session affinity options: cookie-based, IP-based, or header-based
- Custom rules: Route based on headers, URL paths, cookies, or geographic attributes
What Cloudflare LB is NOT: It is not a traditional L4/L7 load balancer that distributes TCP connections across instances within a data center. It is a global traffic management system that steers users to the right origin region or data center. For intra-region instance-level balancing, you would still use a regional load balancer (ALB, NLB, etc.) behind Cloudflare.
AWS Elastic Load Balancing: A Family of Regional Balancers
AWS provides three distinct load balancers, each optimized for different use cases:
Application Load Balancer (ALB) — Layer 7 (HTTP/HTTPS):
| Feature | Details |
|---|---|
| Scope | Regional (single AZ or cross-AZ) |
| Protocol | HTTP, HTTPS, gRPC, WebSocket |
| Routing | Path-based, host-based, header-based, query string, source IP |
| Targets | EC2 instances, containers (ECS/EKS), Lambda functions, IP addresses |
| SSL/TLS | Termination with ACM certificates, SNI for multiple domains |
| Authentication | Built-in OIDC/Cognito authentication |
| Sticky sessions | Cookie-based (application or ALB-generated) |
| Health checks | HTTP/HTTPS, customizable path/interval/threshold |
| Cross-zone | Enabled by default |
ALB is the workhorse for web applications on AWS. Its deep integration with ECS and EKS makes it the natural choice for containerized workloads. The ability to use Lambda functions as targets bridges serverless and traditional architectures.
Network Load Balancer (NLB) — Layer 4 (TCP/UDP/TLS):
| Feature | Details |
|---|---|
| Scope | Regional, with static IP per AZ |
| Protocol | TCP, UDP, TLS |
| Performance | Millions of requests/second, ultra-low latency |
| Source IP | Preserved (no SNAT) |
| Health checks | TCP, HTTP, HTTPS |
| Targets | EC2 instances, IP addresses, ALB (as target) |
| TLS termination | Optional |
| Static IP | One per AZ (or Elastic IP) |
NLB handles workloads where ALB cannot: raw TCP connections, UDP protocols (gaming, DNS, IoT), and scenarios requiring source IP preservation or static IPs. NLB can also front an ALB, combining L4 performance with L7 routing.
Gateway Load Balancer (GLB) — Layer 3 (network appliances):
GLB transparently inserts network appliances (firewalls, IDS/IPS, deep packet inspection) into the traffic flow. It is specialized for security appliance integration and not typically used for application load balancing.
AWS Global Accelerator bridges the gap between regional load balancers and global traffic distribution. It provides two static anycast IP addresses that route traffic over AWS's private backbone to the nearest healthy regional endpoint. This reduces internet routing variability and provides faster failover than DNS-based approaches.
Azure: Front Door (Global) + Load Balancer (Regional)
Azure's load balancing strategy mirrors its CDN/security convergence around Azure Front Door:
Azure Front Door (Global L7):
- Operates on Microsoft's global network across 192+ PoPs
- Combines CDN, WAF, DDoS protection, and global load balancing in one service
- Routing methods: Latency-based, priority, weighted, session affinity
- Health probes: Configurable HTTP/HTTPS probes from multiple PoPs
- SSL termination: Automatic certificate management, custom certificates, mTLS
- URL rewrite and redirect: Transform requests before reaching backends
- Private Link origins: Connect to backends without public IP exposure
- Caching: Built-in CDN caching with customizable rules
Azure Application Gateway (Regional L7):
- Regional HTTP/HTTPS load balancer with WAF v2
- Path-based and host-based routing
- SSL offloading with Key Vault integration
- Autoscaling and zone redundancy
- WebSocket and HTTP/2 support
Azure Load Balancer (Regional L4):
- Standard and Basic tiers
- TCP/UDP load balancing within a region
- Health probes (TCP, HTTP, HTTPS)
- Static frontend IP, backend pools with VMs or VMSS
- Cross-zone and cross-region (via global tier) support
Azure Traffic Manager (DNS-based global):
- DNS-level traffic management (similar to Route 53 routing policies)
- Performance, weighted, priority, geographic, multivalue, and subnet routing
- Works with any internet-facing endpoint (not just Azure)
Azure's load balancing is the most complex to navigate. Four different products cover overlapping use cases, and choosing the right one requires understanding the distinctions between global vs regional, L4 vs L7, and Azure-native vs external endpoints.
Google Cloud Load Balancing: True Anycast Global LB
Google Cloud's load balancer is arguably the most architecturally elegant:
Global External HTTP(S) Load Balancer (the primary product):
- A single anycast IP routes traffic globally to the nearest healthy backend
- Users connect to the nearest Google PoP, and traffic is forwarded over Google's private backbone to the best backend region
- Premium tier uses Google's backbone; Standard tier uses public internet routing
- URL map for path and host-based routing
- Backend services can span multiple regions simultaneously
- Cloud CDN is enabled as a checkbox on backend services
- Cloud Armor (WAF/DDoS) integrates at the load balancer level
- Automatic SSL certificate management via Google-managed certs
- HTTP/2, gRPC, and WebSocket support
The elegance of Google's approach: a single configuration resource (the URL map + backend service) represents a globally distributed, anycast-addressed load balancer with integrated CDN and security. There is no separate "global load balancer" vs "regional load balancer" vs "CDN" vs "WAF" — it is all one system.
Other Google load balancers:
- Regional External HTTP(S) LB: L7 load balancer within a single region (envoy-based)
- External TCP/UDP Network LB: L4 for TCP/UDP workloads (pass-through)
- Internal HTTP(S) LB: L7 for traffic between services within GCP
- Internal TCP/UDP LB: L4 for internal traffic
- Cross-region Internal LB: L7 across regions within GCP
Google's premium tier network is the differentiator. Traffic enters Google's network at the nearest PoP and travels over private fiber to the backend — avoiding the congestion, packet loss, and variable latency of the public internet. This is similar to AWS Global Accelerator but built into the default load balancer at no additional per-accelerator charge.
Feature Comparison
| Feature | Cloudflare LB | AWS ALB/NLB | Azure Front Door | Google Global HTTP(S) LB |
|---|---|---|---|---|
| Scope | Global (DNS + proxy) | Regional (ALB/NLB), global (GA) | Global | Global (anycast) |
| Layer | L7 (HTTP/HTTPS) | L7 (ALB) / L4 (NLB) | L7 (HTTP/HTTPS) | L7 (HTTP/HTTPS) |
| Anycast IP | Cloudflare shared | Static per AZ (NLB), GA provides | Microsoft network | Single global anycast IP |
| Health checks | Multi-location global | Same-region | Multi-PoP global | Google probing system |
| Failover speed | Seconds (proxy-level) | Seconds (within region) | Seconds | Seconds |
| SSL termination | Yes (free Universal SSL) | Yes (ACM certs, free) | Yes (managed certs) | Yes (Google-managed certs) |
| Path-based routing | Via Workers or custom rules | Yes (ALB) | Yes | Yes (URL maps) |
| Weighted routing | Yes | Yes (target group weights) | Yes | Yes (backend weights) |
| Geo routing | Yes (geo steering) | No (ALB), yes (Route 53 + GA) | No (latency-based) | No (proximity-based) |
| Session affinity | Cookie, IP, header | Cookie (ALB), source IP (NLB) | Cookie, IP | Cookie, header, IP |
| WebSocket | Yes | Yes (ALB) | Yes | Yes |
| gRPC | Yes | Yes (ALB) | Limited | Yes |
| mTLS | Yes | Yes (ALB) | Yes | Yes |
| Multi-cloud backends | Yes (any origin) | No (AWS targets only) | Yes (any HTTP endpoint) | No (GCP backends primarily) |
| Integrated CDN | Yes (Cloudflare proxy) | Separate (CloudFront) | Yes (built-in) | Yes (Cloud CDN checkbox) |
| Integrated WAF | Yes (Cloudflare WAF) | Separate (AWS WAF) | Yes (Azure WAF) | Yes (Cloud Armor) |
| Integrated DDoS | Yes (all plans) | Shield Standard (free) | Included | Included |
Multi-Cloud: The Cloudflare Advantage
One of Cloudflare Load Balancing's most significant differentiators is cloud-agnostic origin support. Your origin pools can include:
- AWS EC2 instances
- Azure VMs
- GCP Compute Engine instances
- On-premises data centers
- Bare-metal servers
- Other CDN endpoints
- Any combination of the above
This makes Cloudflare the natural choice for multi-cloud architectures where you need a single load balancer that spans providers. AWS ALB/NLB only target AWS resources. Google's global LB primarily targets GCP backends (external backends are supported but limited). Azure Front Door supports any HTTP endpoint but is optimized for Azure backends.
If your resilience strategy requires failover between AWS and GCP, or between cloud and on-premises, Cloudflare is the only load balancer in this comparison that treats all backends equally.
Health Checking: Global vs Regional Perspective
The location of health checks matters more than most people realize.
Cloudflare runs health checks from multiple PoPs globally. If your origin is healthy from the US but unreachable from Europe (due to a regional network issue, ISP problem, or submarine cable failure), Cloudflare detects this and steers European users to an alternative origin. This global perspective catches issues that regional health checks miss.
AWS ALB/NLB health checks run from within the same region as the load balancer. They detect whether a target is healthy from that region's perspective but cannot detect issues affecting users in other regions. AWS Global Accelerator health checks run from multiple AWS edge locations, providing a broader perspective.
Azure Front Door runs health probes from multiple PoPs, similar to Cloudflare. Azure Application Gateway and Azure Load Balancer check from within the region.
Google runs health checks from Google's distributed probing system, providing a global perspective for the global load balancer. Regional health checks probe from within the region.
Pricing Comparison
Pricing verified as of 13 August 2026. Rates below were re-checked against vendor sources on that date: the AWS Elastic Load Balancing pricing page, the AWS Data Transfer price list API, and the Azure Retail Prices API for Azure Front Door meters. All prices USD, US East, on-demand.
Corrected in this revision. A previous version of this article stated that Azure Front Door has "no fixed monthly charge." That was wrong. Front Door Standard carries a $35.00/month base fee and Front Door Premium a $412.50/month base fee, both confirmed in Microsoft's own retail price feed. At low traffic the base fee is the bill, and omitting it understated Azure's cost by an order of magnitude in our small-deployment scenario. We have corrected the figures and the scenarios below.
What we could not verify. Cloudflare does not publish Load Balancing prices on a public page — the rates are shown only inside the authenticated dashboard, and the public docs link to it rather than quoting figures. Google renders its network and load balancing pricing tables client-side, so no retrievable public figure exists. Where that applies, we label the number as unverified rather than presenting it as confirmed.
Cloudflare Load Balancing
Cloudflare does not publish these prices publicly. The Load Balancing documentation describes it as a paid add-on and directs you to the dashboard for pricing; there is no public rate card to check against. The figures below reflect the commonly cited add-on structure and should be confirmed in your own dashboard before you budget against them.
| Component | Cost (unverified — dashboard-gated) |
|---|---|
| Base (2 origins, 60s health checks, 500K queries) | ~$5/month |
| Additional origins | ~$5/month each |
| Additional 500K DNS queries | ~$0.50 per 500K |
| 10-second health check intervals | Additional (contact sales) |
| Geo steering, session affinity, custom rules | Included |
Two things are verifiable and matter more than the exact rate: Cloudflare Load Balancing is priced per origin and per DNS query, not per GB of traffic, and Cloudflare charges no egress on traffic it serves. Whatever the precise per-origin figure, the shape of the pricing is what produces the cost behaviour at scale — the bill tracks how many backends you have, not how much data flows through them.
AWS Elastic Load Balancing
Verified against the AWS ELB pricing page, us-east-1, 13 August 2026.
ALB:
| Component | Cost |
|---|---|
| Hourly charge | $0.0225/hour (~$16.43/month) |
| LCU-hour | $0.008/LCU-hour |
An LCU (Load Balancer Capacity Unit) is billed on the maximum of four dimensions, not their sum — and knowing which one binds is the whole game in ALB cost modelling:
| LCU dimension | One LCU covers |
|---|---|
| New connections | 25 per second |
| Active connections | 3,000 per minute (1,500 with mutual TLS) |
| Processed bytes | 1 GB/hour for EC2/container/IP targets; 0.4 GB/hour for Lambda targets |
| Rule evaluations | 1,000 per second (first 10 rules free) |
Two details that most comparisons omit and that change the arithmetic materially: Lambda targets get only 0.4 GB/hour per LCU, so a serverless backend behind an ALB consumes LCUs 2.5× faster on the bytes dimension than an EC2 backend carrying identical traffic. And mutual TLS halves the active-connection allowance, which can double LCU consumption on mTLS-heavy APIs. For a moderate workload expect $30–80/month, but model the binding dimension rather than trusting a range.
NLB:
| Component | Cost |
|---|---|
| Hourly charge | $0.0225/hour (~$16.43/month) |
| NLCU-hour | $0.006/NLCU-hour |
NLCU dimensions differ from ALB's and are far more generous on connections: 800 new TCP connections/second, 100,000 active TCP connections (sampled per minute), 1 GB/hour processed. NLB is cheaper per capacity unit and per unit of work for high-connection TCP workloads — a genuine AWS win that the L7-focused comparisons miss.
Global Accelerator: approximately $0.025/hour per accelerator (~$18/month) plus a per-GB data transfer premium. We were unable to confirm the current data transfer premium against a published page in this revision; treat it as indicative.
Azure Front Door
Verified against the Azure Retail Prices API, 13 August 2026 — Microsoft's marketing page renders $- placeholders, so these came from the machine-readable feed.
| Tier | Base fee | Per Request | Data Transfer Out |
|---|---|---|---|
| Standard | $35.00/month | $0.01125 per 10K | $0.112/GB |
| Premium | $412.50/month | $0.0259 per 10K | $0.0825/GB |
Front Door's WAF and routing meters are billed separately again on the classic Front Door Service SKUs: $5.00/month per policy, $1.00/month per rule, $5.00/month per custom domain, $0.75 per million requests, and $20.00/month each for the Default Ruleset and the Bot Protection Ruleset. Bot protection requests add $1.00 per million.
The practical consequence: Front Door Premium starts at $412.50/month before a single request, and a realistic Premium deployment with WAF policies, rules, and several custom domains clears $450–500/month at idle. Front Door is a genuinely capable product — the global L7 platform with integrated WAF, CDN and DDoS is architecturally the closest thing to Cloudflare's model in the hyperscaler world — but it is the most expensive entry point of the four by a wide margin, and its own pricing page will not tell you that.
Front Door Standard is more reasonably positioned: $35/month base plus usage puts it in the same territory as an ALB, with global rather than regional reach. For teams already in Azure who need global L7, Standard is a fair deal.
Google Cloud Load Balancing
Google publishes no retrievable public rates for these SKUs. The network pricing page renders its tables client-side and the SKU group listing enumerates SKU IDs without prices, directing readers to the calculator or to sales. The figures below are the widely cited structure and are unverified:
| Component | Cost (unverified — calculator-only) |
|---|---|
| Forwarding rules (first 5) | |
| Additional forwarding rules | ~$0.01/hour each |
| Data processing | ~$0.008/GB inbound, ~$0.008–0.012/GB outbound |
We flag this rather than reprint it as fact. If you are evaluating Google Cloud Load Balancing, price it in the Google Cloud pricing calculator against your actual forwarding-rule count and traffic — and be sceptical of any comparison article, this one included, that presents a confident GCP figure without saying where it came from.
Egress: The Line Item That Decides This Comparison
Load balancer unit pricing is a rounding error next to the traffic flowing through it. Verified internet egress rates:
| Provider | Egress to internet | Free allowance |
|---|---|---|
| Cloudflare | $0 | Unlimited |
| AWS | $0.09/GB (first 10 TB), $0.085/GB (next 40 TB), $0.07/GB (next 100 TB), $0.05/GB beyond | 100 GB/month, account-wide |
| Azure | $0.087/GB (100 GB–10 TB), $0.083/GB (10–50 TB), $0.07/GB (50–150 TB), $0.05/GB beyond | 100 GB/month |
| Azure Front Door | $0.112/GB (Standard), $0.0825/GB (Premium) | None |
| Google Cloud | Not publicly retrievable | 200 GB/month Standard Tier (per Google's own announcement) |
AWS confirmed via the Data Transfer price list API for us-east-1; Azure via the Retail Prices API for eastus.
At 10 TB/month of delivered traffic — an ordinary mid-sized web property — egress alone runs roughly $920 on AWS, $890 on Azure standard bandwidth, $1,145 through Front Door Standard, and $0 on Cloudflare. The load balancer itself costs $16 to $412 across these providers. The egress line is 2–70× the load balancer line. Any comparison that ranks these products on their unit prices while ignoring data transfer is ranking the wrong number.
Note the internal-transfer charges too. AWS bills $0.01/GB in each direction for cross-AZ traffic, and a load balancer distributing across three AZs generates exactly that traffic by design. Azure now bills inter-AZ transfer at $0.01/GB in and $0.01/GB out as well, and inter-region at $0.02/GB — verified in the retail feed. Cross-zone load balancing is a high-availability best practice on both platforms that quietly carries a per-GB tax.
Regional Price Variation
Rates above are US East. They are not universal: Azure Front Door and bandwidth are zone-priced (verified: $0.087/GB from eastus, $0.11/GB from Australia Southeast), and AWS ALB hourly and LCU rates vary by region with egress varying more sharply still. Cloudflare applies no regional pricing. If your traffic is concentrated outside North America and Europe, re-run every number here against your actual regions before drawing a conclusion.
Worked Total Cost at Three Realistic Deployment Sizes
Each scenario totals the load balancer plus its traffic, because separating them is what makes these comparisons misleading. Arithmetic is shown so you can substitute your own figures.
Scenario 1: Simple failover (2 origins, 100 GB/month delivered)
| Provider | Load balancer | Egress | Monthly total |
|---|---|---|---|
| Cloudflare | ~$5 (unverified) | $0 | ~$5 |
| AWS | $16.43 (ALB hourly) + ~$6 LCU | $0 (within 100 GB free tier) | ~$22 |
| Azure | $35.00 Front Door Standard base + ~$0.11 requests | $11.20 (100 GB × $0.112) | ~$46 |
| ~$18 (1 forwarding rule, unverified) | ~$0 (200 GB Standard Tier free) | ~$18 |
Cloudflare is cheapest here, but note what the correction did: our previous version put Azure at "$15–30" by omitting the base fee. With the verified $35/month Front Door Standard base fee included, Azure is the most expensive option at this size, not a mid-range one. At low traffic, Front Door's base fee dominates entirely — you pay $35 before serving a byte.
Scenario 2: Production web app (4 origins, 50M requests/month, 500 GB delivered)
| Provider | Load balancer | Traffic charges | Monthly total |
|---|---|---|---|
| Cloudflare | ~$15 (4 origins) + plan | $0 | ~$15 + plan |
| AWS | $16.43 + ~$35 LCU | $36.00 (400 GB billable × $0.09) | ~$87 |
| Azure | $35.00 base + $56.25 (50M req × $0.01125/10K) | $56.00 (500 GB × $0.112) | ~$147 |
| ~$18 + ~$5 data processing (unverified) | Not publicly retrievable | ~$23 + egress |
Azure's per-request meter is the surprise at this size: 50M requests at $0.01125 per 10K is $56.25/month in request charges alone, more than the base fee. Front Door bills requests and data and a base fee, three meters where AWS bills two and Cloudflare bills one.
Scenario 3: Global multi-region (8 origins across 4 regions, 500M requests/month, 10 TB delivered)
| Provider | Load balancer | Traffic charges | Monthly total |
|---|---|---|---|
| Cloudflare | ~$45 (8 origins) + plan | $0 | ~$45 + plan |
| AWS | 4 × $16.43 ALB + ~$200 LCU + ~$18 Global Accelerator | $920 (10 TB × ~$0.09) | ~$1,204 |
| Azure | $412.50 Front Door Premium base + $1,295 (500M req × $0.0259/10K) | $825 (10 TB × $0.0825) | ~$2,533 |
| ~$40 forwarding rules (unverified) | Not publicly retrievable | Cannot total honestly |
At this scale the gap is dramatic, and it is worth being precise about why, because "Cloudflare is cheaper" is the least useful version of the finding. Roughly 76% of the AWS total and 33% of the Azure total is egress — data transfer, not load balancing. Azure's remaining bulk is the per-request meter, which at 500M requests costs more than everything else on its bill combined. Cloudflare's advantage here is structural rather than a matter of undercutting on rate: its pricing has no traffic dimension at all, so the same 8-origin configuration costs the same at 10 TB as at 10 GB.
Be fair about the trade-off this represents. Cloudflare's model wins decisively on bandwidth-heavy global L7 traffic. It does not compete at all on L4 TCP/UDP load balancing outside Enterprise Spectrum, where AWS NLB is both cheaper and more capable; it offers nothing equivalent to ALB's deep integration with target groups, auto-scaling, and ECS; and its own pricing is the least transparent of the four, since you cannot check it without an account. Google's global anycast load balancer is architecturally excellent and likely competitive on price — we simply cannot verify the figures, and we would rather say that than guess.
Calculate Your Costs
Use the calculator below to estimate costs for your specific workload:
Try the interactive Load Balancing calculatorRun it free on inventivehq.com →For a broader model that includes compute, storage and egress alongside traffic management, use the cloud cost comparison calculator. If you are weighing DNS costs specifically, the Route 53 pricing calculator prices hosted zones and query volumes.
Continue the Comparison
This article is part of a four-part cluster applying the same verify-every-price method across the cloud stack:
- Cloud pricing models compared: Cloudflare vs AWS vs Azure vs GCP — the full-stack total cost picture and the flat-rate vs metered question.
- Cloudflare Workers vs AWS Lambda vs Cloud Functions vs Azure Functions — the compute behind these load balancers, and why ALB charges LCUs 2.5× faster for Lambda targets.
- Cloudflare vs AWS Shield vs Azure DDoS vs Google Cloud Armor — the security layer that rides on the same traffic, where Front Door's WAF meters stack on top of the base fees above.
SSL/TLS Termination
Load balancers serve as the SSL/TLS termination point in most architectures. How each provider handles certificate management affects both security posture and operational overhead.
| Feature | Cloudflare | AWS ALB | Azure Front Door | Google Global LB |
|---|---|---|---|---|
| Free certificates | Universal SSL (all plans) | ACM (free, auto-renewed) | Managed certs (free) | Google-managed (free) |
| Custom certificates | Business+ / Advanced Certificate Manager | Upload or ACM | Upload or Key Vault | Upload or Certificate Manager |
| Automatic renewal | Yes | Yes (ACM) | Yes (managed) | Yes (Google-managed) |
| TLS versions | 1.0-1.3 (configurable min) | 1.0-1.3 (security policy) | 1.0-1.3 (configurable) | 1.0-1.3 (SSL policy) |
| Cipher suite control | Predefined profiles | Security policy selection | Predefined profiles | SSL policy selection |
| SNI support | Yes (unlimited domains) | Yes | Yes | Yes |
| mTLS (client certs) | Yes (API Shield) | Yes | Yes | Yes |
| Certificate transparency | Automatic CT monitoring | N/A | N/A | Certificate Transparency logs |
Cloudflare's Universal SSL is notable: every domain on Cloudflare automatically gets a free SSL certificate with no configuration required. This includes subdomains and handles renewal automatically. The Advanced Certificate Manager ($10/month) adds custom certificates, certificate pinning, and finer control.
Decision Framework
Not sure which fits? Run your requirements through the Cloud Load Balancer Selector for an instant load balancing comparison across all four providers.
Choose Cloudflare Load Balancing When:
- Multi-cloud or hybrid — you need one load balancer across AWS, Azure, GCP, and on-premises
- Global traffic steering — geo, latency, and weighted routing across regions with integrated CDN
- Simple failover — $5/month for 2-origin health-checked failover beats any alternative
- Security-integrated LB — DDoS, WAF, and bot protection in the same traffic path
- Cost sensitivity at global scale — per-origin pricing does not scale with traffic volume
Choose AWS ALB/NLB When:
- Single-region, high-throughput HTTP — ALB is the most mature L7 load balancer for AWS workloads
- L4 TCP/UDP — NLB for gaming, IoT, gRPC, or any non-HTTP protocol
- Deep AWS integration — targets include EC2, ECS, EKS, Lambda, and IP addresses
- Advanced L7 routing — path-based, host-based, header-based routing with weighted target groups
- Container orchestration — ALB's native ECS/EKS integration is the smoothest container LB experience
Choose Azure Front Door When:
- Azure-native global — global L7 with integrated CDN, WAF, and DDoS for Azure backends
- Private Link origins — secure backend connectivity without public IPs
- Consolidated platform — one service for LB + CDN + WAF instead of three separate products
- Enterprise Microsoft — integration with Azure Monitor, Azure Policy, and Microsoft support
Choose Google Cloud Global LB When:
- True anycast elegance — single anycast IP for global HTTP(S) load balancing with CDN and security
- GCP-native workloads — seamless integration with GKE, Cloud Run, Compute Engine
- Premium network — traffic enters Google's backbone at the nearest PoP for consistently low latency
- Integrated CDN + security — Cloud CDN and Cloud Armor as simple checkboxes on the backend service
The Architectural Choice
Load balancing is the infrastructure category where the providers' architectural philosophies are most visible.
Cloudflare says: "Traffic is already flowing through our network (for CDN and security). We will add intelligent routing on top of the same path — at minimal additional cost."
AWS says: "We provide purpose-built load balancers for every protocol and use case within our cloud. If you need global distribution, add Global Accelerator."
Azure says: "Azure Front Door consolidates CDN, LB, WAF, and DDoS into one global platform. For regional L4/L7, we have dedicated products."
Google says: "Our global anycast load balancer runs on the same network as Search and YouTube. Add CDN and security as configuration options."
The honest takeaway: Cloudflare and Google offer the cleanest global load balancing models — one configuration, one IP (for Google), global distribution. AWS offers the deepest regional load balancing with the most protocol support and tightest container integration. Azure Front Door provides a good middle ground for Azure-centric organizations but adds complexity with its four overlapping LB products.
For most web applications, the right architecture is Cloudflare or Google for global traffic steering plus a regional load balancer (ALB, Azure App Gateway, or GCP regional LB) for intra-region instance distribution. These layers serve different purposes and work well together.