Every free serverless function tier that clears our bar in 2026: 8 offers meet the criteria and 1 offer is demoted with a named reason. Our membership test: your code runs per request with no long-lived instance, billed by invocation or CPU time. We could not confirm today's terms for 5 of them: on 1 the page we cite did not answer, and on 4 our own read did not confirm them. Each row says why.

Best Free Serverless Function Tools

Every free serverless function tier that clears our bar today. Updated 2026-09-30. Our membership test: your code runs per request with no long-lived instance, billed by invocation or CPU time.

8 offers meet our criteria on this page. Of those, 2 carry no recorded change to the terms we publish, 5 a recorded narrowing, and we publish no durability signal for 1. The Durability column below says which offer is in which group, and links the dated record behind every change. We withhold the class where the pricing page does not resolve or states no amount, tier or rate we can read, where we refused the last read, or where the listing is gated. We do not rank these by how much you get, because the limits are not comparable without reading each vendor's page. They are listed in an order that rotates daily. Here is how that order is derived. There is no top slot here to sell.
Why trust this data? Every free tier is verified against the vendor's pricing page with dates tracked. We monitor 476 pricing changes and flag vendors that have reduced or removed free tiers. Rankings start every offer at zero and can only demote. There is no signal a vendor can acquire, lobby for, or buy — there is nothing to add. A record reaches a function page when its category names the function or when it carries a subtype label that names the function. Adding a label to a record publishes it here; removing one withdraws it. No page holds a list of vendors. See all 61 cloud hosting offers →
1
Free

Free tier with $5.40/mo usage credit. No card. Note — discovered 2026-08-28: The free tier now includes a $5.40/mo usage credit instead of a fixed amount of bandwidth and build minutes. Source ↗

Listed in Cloud Hosting, and on this page because we labelled it serverless_function. We read that on 2026-08-31 from https://www.pandastack.io/, where it says: “Firecracker microVMs that boot in 49ms. Agent sandboxes with fork & snapshot, git-driven app hosting, dedicated Postgres 16 and serverless functions on one open-source substrate.”. How we use this

2
Free

Edge compute with 100K requests/day, 10ms CPU time per invocation, 5 cron triggers/account. KV: 1 GB storage, 100K reads/day, 1K writes/day. D1: 5 GB storage, 5M rows read/day, 100K rows written/day. R2 (Standard storage): 10 GB-month/month, 1M Class A ops/month, 10M Class B ops/month. Durable Objects (SQLite-backed only): 100K requests/day. Queues: 10K operations/day. Vectorize: 30M queried vector dimensions/month, 5M stored vector dimensions. Dynamic Workers are paid only. US students 18+ with a verified .edu billing email: Workers Paid (10M requests/month), $5/mo fee waived for 12 months. Best for students.

Listed in Cloud Hosting, and on this page because we labelled it serverless_function. We read that on 2026-08-31 from https://developers.cloudflare.com/workers/, where it says: “Build and deploy serverless applications across Cloudflare”. How we use this

3
Free

Edge runtime — 1M requests/month, 20 GiB egress, 10 hr active CPU/month, 150 GiB-hr memory time, 1 GiB KV storage, 1M KV read units/month, 500K KV write units/month Note — discovered 2026-08-28: Deno Deploy cut its Free plan's CPU time from 15 to 10 hours a month, memory time from 350 GB-hours to 150 GiB-hours, custom domains from 50 to 5, apps from 20 to 10 and team members from 5 to 3; 60 deployments an hour became 15 builds an hour, one at a time. KV read units went up from 450,000 to 1,000,000 a month and write units from 300,000 to 500,000. The pricing page changed between a Common Crawl capture of 2026-08-07 and our read on 2026-08-28. Source ↗

Listed in Cloud Hosting, and on this page because we labelled it serverless_function. We read that on 2026-08-31 from https://deno.com/deploy, where it says: “One simple platform for anything that runs with JavaScript or Typescript.”. How we use this

Recorded, but does not affect rank:
  • discovered 2026-08-28 · effective date unknown — limits reduced: Deno Deploy cut its Free plan's CPU time from 15 to 10 hours a month, memory time from 350 GB-hours to 150 GiB-hours, custom domains from 50 to 5, apps from 20 to 10 and team members from 5 to 3; 60 deployments an hour became 15 builds an hour, one at a time. KV read units went up from 450,000 to 1,000,000 a month and write units from 300,000 to 500,000. The pricing page changed between a Common Crawl capture of 2026-08-07 and our read on 2026-08-28. Source ↗
  • effective 2026-04-12 — limits reduced: Egress on the Free plan fell from 100 GB to 20 GB a month. Deno Deploy's pricing page changed between Common Crawl captures of 2026-03-15 and 2026-04-12. Source ↗
4
Free

The Free plan is $0 with a limit of 300 credits per month, covering production deploys (15 credits each), compute (10 credits per GB-hour), bandwidth (20 credits per GB) and web requests (2 credits per 10k requests). Netlify says the Free plan is always free, with hard monthly limits that cannot be exceeded or incur costs; extra credits need a paid plan. Personal is $9 a month with 1,000 credits. Best for personal projects. Note — 2026-04-14: Netlify changed its credit rates: bandwidth went from 10 to 20 credits per GB and compute from 5 to 10 credits per GB-hour, while web requests went from 3 to 2 credits per 10,000. The Free plan keeps 300 credits a month, so each credit buys half as much bandwidth and compute. Source ↗

Listed in Cloud Hosting, and on this page because we labelled it serverless_function. We read that on 2026-08-31 from https://docs.netlify.com/, where it says: “Build & deploy faster with any modern frontend stack or AI agent.”. How we use this

5
Vercel stable
Hobby

Hobby plan, $0 a month, for non-commercial personal use only. Includes 100 GB Fast Data Transfer, 1M Edge Requests, 1M Function Invocations, 4 hours Fluid Active CPU, 360 GB-hrs Fluid Provisioned Memory, 1 GB Blob Storage and 5K image transformations a month. Hobby accounts are limited to these caps and cannot buy more usage. Pro is $20 a month with one deploying seat; each additional deploying seat is $20 a month. Best for personal projects.

Listed in Cloud Hosting, and on this page because we labelled it serverless_function. We read that on 2026-08-31 from https://vercel.com/docs, where it says: “Ship anything with Vercel”. How we use this

Recorded, but does not affect rank:
  • effective 2026-02-01 — pricing restructured: New Pro projects now default to Turbo build machines (30 vCPUs, 60GB memory) at $0.126/minute — 9x more expensive than Standard machines ($0.014/min). Pro plan still $20/seat/month with $20 usage credit, but real-world build costs for moderate teams can hit $400+/month. Standard machines still available but must be manually selected. Source ↗
  • effective 2026-01-01 — pricing restructured: Pro plan moved to credit-based model ($20/mo credit pool), Hobby plan metrics renamed and restructured — bandwidth→Fast Data Transfer, serverless split into Active CPU + Provisioned Memory, Blob Storage and Image Transformations added Source ↗
6
Free

Stateful serverless compute — Workers Free plan : Only Durable Objects with SQLite storage backend are available. Free plan requests are limited to 100,000 / day and duration is limited to 13,000 GB-s / day.

Listed in Cloud Hosting, and on this page because we labelled it serverless_function. We read that on 2026-08-31 from https://developers.cloudflare.com/durable-objects/, where it says: “Build stateful serverless applications with Durable Objects, including AI agents, real-time chat, and collaborative apps.”. How we use this

Recorded, but does not affect rank:
  • effective 2026-01-07 — pricing restructured: SQLite storage billing began for Durable Objects — previously free during beta Source ↗
7
Always Free

Always Free: 2M requests/month, 360K GB-seconds memory, 180K vCPU-seconds compute, 1 GB North America egress. Fully managed serverless containers. When we last read the page we cite for this offer, on 2026-09-22, we found a change we could not reconcile with the terms we publish, so we cannot confirm these terms today.

Listed in Cloud Hosting, and on this page because we labelled it serverless_function. We read that on 2026-08-31 from https://cloud.google.com/run/docs, where it says: “Fully managed application platform to run your code, function, or container on top of Google's highly scalable infrastructure.”. How we use this

8
Val Town stable
Free

Serverless scripting platform — 100K runs/day, 1 minute wall clock per run, unlimited public vals, MCP integration Best for unlimited usage needs.

Listed in Cloud Hosting, and on this page because we labelled it serverless_function. We read that on 2026-08-31 from https://docs.val.town/, where it says: “Val Town lets you - and your LLM - write and run JavaScript, always deployed in 100ms. You can make websites, APIs, MCP servers, crons, Slack bots, email automations, webhook handlers, and more.”. How we use this

Demoted — and exactly why

These offers reach this page too and rank below the list above. Each one names the recorded fact behind it. A recorded limit reduction, pricing restructure or new restriction is shown on every surface where the offer appears, with its date and summary — but it does not move rank. We have change records for only 16% of vendors, and disproportionately for well-known ones, so ranking on them would demote the vendors we happen to watch most closely.

−1
Free

Ampt lets teams build, deploy, and scale JavaScript apps on AWS without complicated configs or managing infrastructure. Free Preview plan includes 500 invocations hourly, 2,500 invocations daily and 50,000 invocations monthly. Custom domains are allowed only in the paid plans. The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-09-02, so we cannot confirm these terms today.

Listed in Cloud Hosting, and on this page because we labelled it serverless_function. We read that on 2026-08-31 from https://getampt.com/docs, where it says: “Ampt lets developers write apps with their favorite tools and JavaScript frameworks, then automatically provisions, manages, and optimizes cloud resources for them.”. How we use this

  • −1 stale_verification Our last read of the vendor's pricing page, on 2026-09-02, could read no amount, tier or rate on the page. This is our confidence in the record, not a change by the vendor. (a limit of ours, not a change by the vendor)
Recompute today's order yourself. The order above is a permutation seeded only on the UTC date and the query key — no vendor name, slug, id or offer field is an input. The algorithm is published, so anyone can reproduce this page's order without asking us.
date
2026-09-30
query_key
best-of:serverless_function
seed
83bb980810c60ad9a65dfd7e0187bd473993083e55bae9d777476d7e4fb769c9
tie_count
8

Quick Comparison

Vendor Free Tier Key Limits Durability Read / catalogue date
PandaStack Free Free tier with $5.40/mo usage credit. No card.
read found the page different · 2026-09-11
watch
discovered 2026-08-28 · effective date unknown
2026-09-11 / 2026-07-15
Cloudflare Workers Free Edge compute with 100K requests/day, 10ms CPU time per invocation, 5 cron triggers/account. KV: 1 GB storage, 100K reads...
read found the page different · 2026-09-13
stable 2026-09-13 / 2026-08-11
Deno Deploy Free Edge runtime — 1M requests/month, 20 GiB egress, 10 hr active CPU/month, 150 GiB-hr memory time, 1 GiB KV storage, 1M KV... volatile
discovered 2026-08-28 · effective date unknown
2026-09-24
Netlify Free The Free plan is $0 with a limit of 300 credits per month, covering production deploys (15 credits each), compute (10 cr... volatile
effective 2026-04-14
2026-09-22
Vercel Hobby Hobby plan, $0 a month, for non-commercial personal use only. Includes 100 GB Fast Data Transfer, 1M Edge Requests, 1M F... watch
effective 2026-02-01
2026-09-22 / 2026-08-26
Cloudflare Durable Objects Free Stateful serverless compute — Workers Free plan : Only Durable Objects with SQLite storage backend are available. Free p...
read found the page different · 2026-09-17
watch
effective 2026-01-07
2026-09-17 / 2026-08-13
Google Cloud Run Always Free Always Free: 2M requests/month, 360K GB-seconds memory, 180K vCPU-seconds compute, 1 GB North America egress. Fully mana... not published
read not reconciled · 2026-09-22
2026-09-22 / 2026-08-18
Val Town Free Serverless scripting platform — 100K runs/day, 1 minute wall clock per run, unlimited public vals, MCP integration stable 2026-09-21

Frequently Asked Questions

What is the best free serverless function tool in 2026?

We publish no ranking of these. Nothing we record measures popularity or generosity, so naming a best or a top few would be our preference rather than our data. We hold 8 free serverless function offers that clear our bar, each listed with the terms we publish and the date we last read them. Our ranking rule is published at /criteria.

Which of these free serverless function tiers have held their terms?

8 offers meet our criteria on this page. Of those, 2 carry no recorded change to the terms we publish, 5 a recorded narrowing, and we publish no durability signal for 1. The Durability column below says which offer is in which group, and links the dated record behind every change. We withhold the class where the pricing page does not resolve or states no amount, tier or rate we can read, where we refused the last read, or where the listing is gated. We do not rank these by how much you get, because the limits are not comparable without reading each vendor's page.

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