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CompletionKit

Runs a prompt template over a dataset across several LLM providers, then scores the outputs with an LLM judge against your metrics.

Free plan · From $29/moActively maintained

DataEvaluationFree tier
completionkit.com ↗
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At a glanceswept Oct 22, 2026

≈ 1visits/mo

Little sign of use · estimate, read Oct 13, 2026

For
developers and teams building AI apps who need to measure prompt changes before shipping
Price
Free plan · From $29/mopricing page, read Oct 21, 2026Trial & discounts: save 17% yearly
Activity
Actively maintainedrelease 9 days ago · site updated 4 months ago
Company
Homemade Software Inc. · Domain since 2024privacy policy · domain registered
Runs as
Self-hosted
Used for
  • score prompt outputs against custom metrics using an LLM judge
  • compare prompt versions across models on the same dataset
  • generate revised prompts from judge feedback on your data
read off completionkit.com on Oct 21, 2026
Worth knowingcomputed from what we read · each with its source
Pricingpricing page, read Oct 21, 2026

Free plan · From $29/mo

Trial & discounts save 17% yearly

pricing page

Your datawhat they publish, each line with its page · read Oct 21, 2026

“We do not use Your Content to train LLMs for third parties or for any purpose other than operating the Service for you.”

privacy policy ↗

These are CompletionKit's own statements, read from its pages. We did not audit them. A line that is missing was not found on the pages we read; it does not mean the practice is absent.

How a program reaches itfound, not claimed · read Oct 21, 2026
  • MCP servercom.completionkit/evalsverified in the MCP registry
  • Stateanswers, 54 toolschecked 2026-10-21
  • Address to connectcompletionkit.com/mcp
  • API docscompletionkit.com/docs/apithe vendor's page ↗
  • Status pagelinked from the homepagestatus.completionkit.com ↗

MCP server details →

This card as JSON, for your agent →

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.

Alternatives in Databy use, among tools still maintained

Figure and bar: visits/mo, estimate · year: online since

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Questions this page answers
  • What is CompletionKit?

    Runs a prompt template over a dataset across several LLM providers, then scores the outputs with an LLM judge against your metrics. It is listed in the Atlas under Data and made by Homemade Software Inc.

  • Who is CompletionKit for?

    developers and teams building AI apps who need to measure prompt changes before shipping

  • How much does CompletionKit cost?

    CompletionKit has a free plan; paid plans start at $29/mo, per its pricing page on 2026-10-21.

  • Is CompletionKit free?

    Yes, CompletionKit has a free plan, per its pricing page on 2026-10-21.

  • Do people use CompletionKit?

    Little sign of use: ≈ 1 visits/mo · estimate, 2026-10.

  • Is CompletionKit still maintained?

    Actively maintained: release 9 days ago · site updated 4 months ago.

  • Who owns CompletionKit?

    CompletionKit is run by Homemade Software Inc., per its privacy policy (2026-10-21).

  • Does CompletionKit train AI on your data?

    No, per its privacy policy (2026-10-21): “We do not use Your Content to train LLMs for third parties or for any purpose other than operating the Service for you.”

  • Is CompletionKit safe?

    We do not audit vendors. What CompletionKit publishes, read 2026-10-21: GDPR stated on its privacy policy; on training with your data, “We do not use Your Content to train LLMs for third parties or for any purpose other than operating the Service for you.”.

  • What are alternatives to CompletionKit?

    In Data, by use: Firecrawl, Novada, Cube, Keylabs, Wherobots, Factori.

How we read a tool

No votes, no reviews, no vendor claims. Every week a crawler reads each tool's own site and a few public registries, and the words on the card are bands over what it read.

  • Use: visits to the site (estimated), installs from npm and PyPI, presence in Chrome's usage report.
  • Activity: the newest release on GitHub, npm or PyPI; the newest dated page on the site; open roles on a public jobs board.
  • Price: the vendor's own pricing page, read with the date. A figure is printed only when it is on that page.
  • The line and the use cases are written by us from the homepage, one tool at a time, and refused when they repeat the vendor's marketing.

How AI assistants read each site — the reading vendors ask us about — is on each tool's own visibility page.

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