Azure Functions vs Fastly Compute
Azure Functions and Fastly Compute cannot be scored on the same axes — one of them does not publish a rate for everything serverless functions bills on.
List prices checked
Rate cards side by side
Only the axes at least one of them bills on. A dash means that provider does not charge for it.
| Billing axis | Azure Functions | Fastly Compute | Difference |
|---|---|---|---|
| Entry plan | — | $50.00/mo | — |
| Free tier | Yes | Yes | — |
Source: Microsoft pricing (May 2026) · Fastly pricing (May 2026). Published list prices only — committed-use discounts, regional variation, and per-request charges are not included. Not yet independently re-checked against the vendor’s page.
Monthly cost for three real workloads
The rate cards applied to identical usage. This is where the winner changes.
| Workload | Azure Functions | Fastly Compute | Cheaper |
|---|---|---|---|
| Side projectA personal site or small app with modest traffic, a few gigabytes of assets, and one small always-on process. | — | $50 | Not comparable |
| Growing SaaSA funded product serving a few thousand daily users, with an image-heavy frontend and two application servers. | — | $50 | Not comparable |
| Media-heavy siteA publisher or video product where delivery dominates the bill and compute is almost an afterthought. | — | $50 | Not comparable |
Workload definitions are identical on every comparison page, so figures here can be read against any other pair in the same category.
What each one is for
Azure Functions
by Microsoft
Microsoft's event-driven compute, with a consumption plan matching Lambda's economics and premium plans that trade scale-to-zero for predictable latency.
Free tier: 1M executions and 400,000 GB-seconds per month
Fastly Compute
by Fastly
WebAssembly at the edge with sub-millisecond startup, aimed at request manipulation and personalisation rather than at general application hosting.
Free tier: Trial credit only
Common questions
- Is Azure Functions or Fastly Compute cheaper in 2026?
- Neither can be scored across all three workloads, because at least one of them does not publish a rate for every axis this category bills on.
- Which has the better free tier, Azure Functions or Fastly Compute?
- Both publish one. Azure Functions: 1M executions and 400,000 GB-seconds per month. Fastly Compute: Trial credit only.
- What do these estimates not include?
- Committed-use and reserved discounts, regional price variation, per-request API charges, support plans, and minimum retention periods. All of those move real invoices, sometimes by a lot. These figures compare published list prices for the same workload, which is the comparison the rate cards alone cannot give you.