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harness vs kratos

harness and kratos share 10 technologies: pgx, Postgres, SQLite, github.com/hashicorp/golang-lru/v2, Google, github.com/jmoiron/sqlx, github.com/golang-jwt/jwt/v5, golang.org/x/oauth2, Prometheus, and github.com/sirupsen/logrus. Both are written in Go.

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What they share and what sets them apart

harness

harness

Harness Open Source is an end-to-end developer platform with Source Control Management, CI/CD Pipelines, Hosted Developer Environments, and Artifact Registries.

Go38.8kRead on November 6, 2026, at commit 9ed0835What is harness built with?

Only in harness

In common

ory

kratos

Headless cloud-native authentication and identity management written in Go. Scales to a billion+ users. Replace Homegrown, Auth0, Okta, Firebase with better UX and DX. Passkeys, Social Sign In, OIDC, Magic Link, Multi-Factor Auth, SMS, SAML, TOTP, and more. Runs everywhere, runs best on Ory Network.

Go14kRead on November 9, 2026, at commit b86338dWhat is kratos built with?

Only in kratos

Side by side

SizeLines written by people and agents, without generated ones; code files, without tests.
harness588,842 lines written3,639 code files
kratos206,262 lines written598 code files
Who writes itA commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
harness0% of its commits signed by AI
kratos1.5% of its commits signed by AIWith Claude Code
ActivityFrom GitHub and its history, on the day SeeRepo read it.
harnessLast push November 6, 20264,025 commits38,842 stars
kratosLast push July 29, 20265,225 commits13,951 stars
TestsThe files that test the code, and the share of code files a test imports.
harness493 test files20.7% of its code files have a test that imports them
kratos531 test files66.2% of its code files have a test that imports them

Frequently asked questions

Which is bigger, harness or kratos?
harness, with 588,842 lines written; kratos has 206,262.

The proof: harness/harness's code at commit 9ed0835

Which has more GitHub stars, harness or kratos?
harness, with 38,842 stars; kratos has 13,951.

The proof: harness/harness on GitHub

Which has more tests, harness or kratos?
kratos, with 531 test files; harness has 493.

The proof: ory/kratos's code at commit b86338d

Which was updated more recently, harness or kratos?
harness: its last push was on November 6, 2026, and kratos's on July 29, 2026.

The proof: harness/harness's commits on GitHub

Which has more commits signed by AI, harness or kratos?
kratos: an AI signed 1.5% of its commits, with Claude Code.

The proof: the commits each tool signed in ory/kratos

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