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 2 of them: on 1 the page we cite did not answer, and on 1 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 2026-11-14. 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, 5 carry a recorded narrowing to the terms we publish, 1 a recorded widening, and we publish no durability signal for 2. 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, where the listing is gated, or where a narrowing in our records cites no source or no archived copy of the vendor's page has confirmed it. 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 513 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 64 cloud hosting offers →

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.

Vercel restricts Hobby to non-commercial personal use: a deployment used for anyone's financial gain, including a paid employee or consultant writing the code, needs a Pro or Enterprise plan. (From vercel.com/docs/limits/fair-use-guidelines, read 2026-10-04.)
In most cases, exceeding Hobby plan usage limits requires waiting 30 days before using the feature again. (From vercel.com/docs/plans/hobby, read 2026-10-07.)
On Hobby, Vercel's terms let it use your content to train its AI models and share it with third parties for their model training; you can opt out in your team settings. (From vercel.com/legal/terms, read 2026-10-07.)
Hobby teams get 10 GB of Deployment Storage; going over it can block new deployments until you delete some. (From vercel.com/changelog/hobby-projects-now-retain-fewer-deployments-to-free-up-storage, read 2026-10-07.)
After 30 days, Vercel deletes a Hobby project's old deployments except its 3 most recent production deployments, its 3 most recent deployments of any type and its current production deployment. A team over its 10 GB of Deployment Storage loses those other deployments immediately. (From vercel.com/changelog/hobby-projects-now-retain-fewer-deployments-to-free-up-storage, read 2026-10-12.)
Flat Rate CDN is available on Pro plans. Pro includes the lowest tier at no extra cost: 1M CDN requests and 1 TB of data transfer a month. Paid tiers are $20 a month for 10M requests and 50 TB, $100 for 50M and 50 TB, and $300 for 150M and 50 TB. A Pro team turns it on in Billing settings. Usage above a tier moves the team to a higher tier at the start of the next cycle. Flat Rate CDN is not for bulk file distribution or download services, or large-scale media or file delivery that uses most bandwidth. (From vercel.com/docs/pricing/flat-rate-cdn, read 2026-10-16.)
Vercel's Hobby plan needs no credit card. (From vercel.com/docs/plans/pro-plan/trials, read 2026-10-22.)

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 2026-07-20 — pricing restructured: By July 20, 2026, new Vercel Pro and Enterprise accounts use Elastic build machines by default, which scale between 4 and 30 vCPUs and bill $0.0035 per CPU minute. From February 2026 the default for new Pro projects had been Turbo, billed at $0.126 a minute. Vercel now lists Turbo at $0.105 a minute and Standard at $0.014. Source ↗
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 ↗

Full profile Alternatives Compare Compare vercel.com/pricing ↗

Google Cloud Run

Always Free

Always Free: 2M requests/month, 360K GB-seconds memory, 180K vCPU-seconds compute, 1 GB North America egress. Fully managed serverless containers. If your service uses instance-based billing, its free tier is 240K vCPU-seconds and 450K GiB-seconds a month instead of 180K and 360K. Jobs get the same 240K and 450K. Delayed Jobs get 342,857 vCPU-seconds and 642,857 GiB-seconds a month, and worker pools 384,204 vCPU-seconds and 728,744 GiB-seconds (Google states each free tier at us-central1 prices). When we read the page we cite for this offer on 2026-10-13, we refused the change we considered recording because it named no figure that had moved, and we have read it again since, on 2026-11-02, without confirming the terms above, so we cannot confirm these terms today.

Google Cloud's Free Tier requires a billing account. (From docs.cloud.google.com/free/docs/free-cloud-features, read 2026-10-07.)
Usage beyond the Free Tier's monthly limits is billed at standard rates. (From docs.cloud.google.com/free/docs/free-cloud-features, read 2026-10-07.)
Google Cloud's Terms of Service grant use for customer applications with material value independent of the services. The terms restrict resale and circumventing fees but do not prohibit commercial use. (From cloud.google.com/terms, read 2026-10-29.)
Free Tier monthly usage limits are calculated per billing account. (From docs.cloud.google.com/free/docs/free-cloud-features, read 2026-10-29.)
Google Cloud's terms prohibit creating multiple projects to simulate a single project or circumvent usage limits. (From cloud.google.com/terms, read 2026-11-07.)
Apps deployed from Google AI Studio can run on Cloud Run under Google's Starter Tier, which needs no credit card or billing account and limits regions, quotas and resources. (From docs.cloud.google.com/docs/starter-tier, read 2026-10-12.)
In Tier 1 regions such as Iowa (us-central1), the default request-based rates past the free tier are $0.000024 per vCPU-second, $0.0000025 per GiB-second, and $0.40 per million requests. In Tier 2 regions such as London (europe-west2), the rates are $0.0000336 per vCPU-second and $0.0000035 per GiB-second. (From cloud.google.com/run/pricing, read 2026-10-29.)
When a spend cap is hit, Cloud Run workloads pause. Services return 5xx errors. The cap resets on the first day of the next billing cycle. (From docs.cloud.google.com/run/docs/configuring/billing-settings, read 2026-10-29.)
Spend cap enforcement is not instant. Any cost overages before enforcement are billed as normal. (From docs.cloud.google.com/billing/docs/how-to/budgets-spend-caps, read 2026-10-29.)

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

Full profile Alternatives cloud.google.com/run/pricing ↗

Val Town stable

Free

Serverless scripting platform, shutting down on January 10, 2027, with no new signups since November 10, 2026. Free plan for existing users: 100K runs/day, 1 minute wall clock per run, unlimited public vals, MCP integration

Val Town is winding down: new signups and plan upgrades ended on November 10, 2026, Val Town becomes read-only on December 10, 2026 (except SQLite and blob storage), and all other services end on January 10, 2027. Billing is paused, and existing subscriptions continue free until then. (From blog.val.town/winding-down, read 2026-11-11.)

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

Full profile Alternatives www.val.town/pricing ↗

Cloudflare Workers stable

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. Workers Paid has a minimum charge of $5 per month per account. It includes 10 million requests and 30 million CPU milliseconds monthly. Each additional million requests costs $0.30. Each additional million CPU milliseconds costs $0.02. Duration is not charged.

On the Free plan an account's Workers get 100,000 requests a day, shared with Pages Functions and reset at midnight UTC. Past that, a route set to fail closed returns Cloudflare's error 1027, and a route set to fail open skips the Worker as if none were configured. (From developers.cloudflare.com/workers/platform/limits, read 2026-10-06.)
On the Free plan a request may use 10 ms of CPU time; one that uses more fails with error 1102. Time spent waiting on fetch calls, KV reads or database queries does not count. (From developers.cloudflare.com/workers/platform/limits, read 2026-10-06.)
Cloudflare's terms prohibit processing or collecting credit card information on any site using its free services. (From cloudflare.com/terms, read 2026-10-06.)
Cloudflare's subscription agreement's list of restrictions does not include commercial use. The only restriction specific to free services bars processing or collecting credit card information on the site. (From cloudflare.com/terms, read 2026-10-29.)
Cloudflare's subscription agreement bars signing up for the services on behalf of a third party unless Cloudflare permits it in writing. (From cloudflare.com/terms, read 2026-10-29.)
Cloudflare may change a Worker's workers.dev subdomain for any reason. Custom domains are not affected. (From cloudflare.com/service-specific-terms-developer-platform, read 2026-10-06.)
Until December 1, 2026, Workers Logs on the Free plan allows 200,000 log events written per day with 3-day retention; from that date it allows 0.5 GB of log and trace ingestion per day for the whole account with seven-day retention. The Paid plan includes 20 million log events per month, then $0.60 per additional million, with 7-day retention. (From developers.cloudflare.com/workers/platform/pricing, read 2026-10-17.)
From December 1, 2026, all Cloudflare logs and traces use the same pricing model. These share one account-level ingestion and storage allowance: Workers Logs, Workers Traces, Cloudflare Traces, Containers logs, R2 Data Access Logs, AI Gateway logs and Issues. Free includes 0.5 GB of ingestion per day and seven-day retention; ingestion stops at the daily limit and resumes at 00:00 UTC. Paid includes 50 GB of ingestion and 10 GB-month of storage per billing cycle, then $0.25 per GB of ingestion and $0.10 per GB-month of storage. (From developers.cloudflare.com/observability/pricing, read 2026-10-17.)
Cloudflare Workers' Free plan needs no credit card. (From cloudflare.com/products/workers, read 2026-10-22.)

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

Full profile Alternatives Compare Compare developers.cloudflare.com/workers/platform/pricing/ ↗

Deno Deploy caution discovered 2026-08-28 reduced

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 ↗

Deno is joining Cloudflare. Deno said on 2026-10-09 that Deno Deploy will keep running for six months and then shut down; it gave no exact date. Deno will help paying customers move to Cloudflare Workers. (From deno.com/blog/cloudflare, read 2026-10-12.)
Deno Deploy's Free plan has restricted limits until the organization links a credit card to verify itself. (From docs.deno.com/deploy/changelog, read 2026-10-22.)

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 ↗

Full profile Alternatives deno.com/deploy/pricing ↗

Netlify stable

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.

If one site uses up the Free plan's monthly credits, Netlify pauses every site on the account until the next billing cycle or an upgrade. (From docs.netlify.com/manage/accounts-and-billing/billing/billing-for-credit-based-plans/billing-faq-for-credit-based-plans, read 2026-10-07.)
Paused sites show a "Site not available" page, take no traffic or form submissions, and cannot get new production deploys. (From docs.netlify.com/manage/accounts-and-billing/billing/billing-for-credit-based-plans/billing-faq-for-credit-based-plans, read 2026-10-07.)
New Free-plan projects created on or after August 19, 2026 show a "Powered by Netlify" badge to every visitor by default; you can turn it off for each project under Project configuration > General. (From docs.netlify.com/manage/projects/powered-by-netlify-badge, read 2026-10-12.)
Netlify Database compute and bandwidth use the same 300 monthly credits as other Free plan features. Compute costs 10 credits per unit, with one unit used per hour at 1 compute unit. Bandwidth costs 20 credits per GB. This allows about 30 hours of database activity if no other features use credits. (From docs.netlify.com/build/data-and-storage/netlify-database/billing-and-usage, read 2026-10-21.)
On the Free plan, an account can have 3 databases. Each runs at 1 compute unit, sleeps after 5 minutes without activity and cannot be set to stay on. Each is limited to 5 GB of storage, and to 5 GB of data written and 5 GB of bandwidth per billing period. (From docs.netlify.com/build/data-and-storage/netlify-database/billing-and-usage, read 2026-10-21.)
Netlify's Free plan needs no credit card; the paid Personal and Pro plans need a payment method. (From docs.netlify.com/manage/accounts-and-billing/billing/billing-for-credit-based-plans/billing-faq-for-credit-based-plans, read 2026-10-22.)
Netlify says its Free plan can be used for commercial projects as well as personal sites, in a blog post dated November 12, 2024. (From netlify.com/blog/introducing-netlify-free-plan, read 2026-10-23.)
An agent can deploy to Netlify with no account using the --allow-anonymous flag. The deploy gets a live URL, and a person has one hour to claim it by logging in or signing up. Sites using serverless or edge functions still need an account. (From docs.netlify.com/start/quickstarts/deploy-from-ai-code-generation-tool, read 2026-10-22.)

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

Full profile Alternatives Compare Compare www.netlify.com/pricing/ ↗

Cloudflare Durable Objects stable

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.

The Workers Paid plan bills Durable Objects usage past the free tier with a $5 minimum monthly charge per account. It includes 1 million requests and 400,000 GB-s of duration monthly, with overages at $0.15 per million requests and $12.50 per million GB-s. (From developers.cloudflare.com/durable-objects/platform/pricing, read 2026-10-29.)
On the Workers Paid plan, 25 billion SQLite rows read, 50 million rows written and 5 GB-month of stored data are included a month. Rows read over 25 billion cost $0.001 per million. Rows written over 50 million cost $1.00 per million. Stored data over 5 GB-month costs $0.20 per GB-month. (From developers.cloudflare.com/durable-objects/platform/pricing, read 2026-10-29.)
On the Free plan, exceeding any free limit causes further operations of that type to fail with an error. Daily free limits reset at 00:00 UTC. (From developers.cloudflare.com/durable-objects/platform/pricing, read 2026-10-29.)
A SQLite-backed Durable Object has a 10 GB storage limit on Workers Paid and 1 GB on Free. At the limit, write operations fail with "database or disk is full: SQLITE_FULL"; reads and deletes still work. (From developers.cloudflare.com/durable-objects/platform/limits, read 2026-10-29.)

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 ↗

Full profile Alternatives developers.cloudflare.com/durable-objects/platform/pricing/ ↗

PandaStack

Free

Free tier with $5.40/mo usage credit. No card.

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

Full profile Alternatives www.pandastack.io ↗

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

ampt.dev

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 2026-10-12, 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 2026-10-12, 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)

Full profile Alternatives getampt.com ↗

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: 2026-11-14
query_key: best-of:serverless_function
seed: b5927ac28c74695811e8e9834f217c1b0fd40d1fc0405a614db4f4cdf9c42cda
tie_count: 8

Quick Comparison

Vendor	Free Tier	Key Limits	Durability	Read / catalogue date
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	2026-11-07
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 no difference measured · 2026-10-13	2026-11-02 / 2026-08-18
Val Town	Free	Serverless scripting platform, shutting down on January 10, 2027, with no new signups since November 10, 2026. Free plan...	watch effective 2026-11-10	2026-11-05
Cloudflare Workers	Free	Edge compute with 100K requests/day, 10ms CPU time per invocation, 5 cron triggers/account. KV: 1 GB storage, 100K reads...	improving effective 2026-09-04	2026-11-02
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 effective 2026-10-09	2026-11-08
Netlify	Free	The Free plan is $0 with a limit of 300 credits per month, covering production deploys (15 credits each), compute (10 cr...	watch effective 2026-04-14	2026-10-28
Cloudflare Durable Objects	Free	Stateful serverless compute — Workers Free plan : Only Durable Objects with SQLite storage backend are available. Free p...	watch effective 2026-01-07	2026-11-02
PandaStack	Free	Free tier with $5.40/mo usage credit. No card.	—	2026-10-29

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, 5 carry a recorded narrowing to the terms we publish, 1 a recorded widening, and we publish no durability signal for 2. 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, where the listing is gated, or where a narrowing in our records cites no source or no archived copy of the vendor's page has confirmed it. 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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