Values are comparable only within the scope shown. Runtime, plan, model, invocation mode, and account-specific capacity can change the effective result.
Quick comparison
| Criterion | Vercel | AWS Lambda | Comparability note |
|---|---|---|---|
| Maximum execution | Eligible Pro/Enterprise beta1,800 seconds (30 minutes)Pro and EnterpriseVercel | Standard function timeout900 seconds (15 minutes)A function-level configuration ceiling; the configured timeout may be lower.Amazon Web Services | The Vercel value requires eligible runtime, plan, Fluid compute, and opt-in; a configured timeout may be lower on either platform. |
| Ordinary request/response payload | Function request/response4.5 MBPayloads over the documented limit return FUNCTION_PAYLOAD_TOO_LARGE with status 413.Vercel | Synchronous request/response6 MB eachAWS uses MB in Lambda docs to mean 1,024 KB.Amazon Web Services | AWS streamed and asynchronous modes have separate values. |
| Streamed response | Same documented Function response body cap4.5 MBPayloads over the documented limit return FUNCTION_PAYLOAD_TOO_LARGE with status 413.Vercel | Synchronous streamed response200 MBBandwidth is uncapped for the first 6 MB and limited for the remainder according to AWS documentation.Amazon Web Services | Streaming behavior, bandwidth, integration services, and client limits still apply. |
Which is best for your requirement?
Framework-integrated web functions
Vercel can reduce deployment friction when the runtime and plan fit.
Multiple invocation and event modes
Lambda exposes distinct synchronous, asynchronous, and streaming constraints.
Very long work
Prefer resumable orchestration over holding an HTTP function open at a platform maximum.
Validate the decision with your workload
Before choosing between Vercel and AWS Lambda, reproduce the comparison with the exact plans, models, regions, runtimes, and invocation paths you intend to operate. The reviewed rows cover maximum execution and ordinary request/response payload and streamed response; they do not turn different pricing, reliability, developer experience, or ecosystem tradeoffs into one universal score.
- Capture representative request sizes, token usage, duration, concurrency, storage, and failure behavior at realistic percentiles.
- Test the boundary and the recovery path on both candidates, including throttling, timeouts, partial failure, retries, and cost controls.
- Record which scoped observation drove the choice and recheck its official source before migration or a major traffic increase.
Official sources
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