Source: https://seerepo.com/compare/cadence-workflow/cadence/vs/harness/harness
Markdown source: https://seerepo.com/compare/cadence-workflow/cadence/vs/harness/harness.md
Description: cadence and harness share 6 technologies: pq, Postgres, github.com/jmoiron/sqlx, github.com/golang-jwt/jwt/v5, golang.org/x/oauth2, and github.com/aws/aws-sdk-go. Both are written in Go.

# cadence vs harness

cadence and harness share 6 technologies: pq, Postgres, github.com/jmoiron/sqlx, github.com/golang-jwt/jwt/v5, golang.org/x/oauth2, and github.com/aws/aws-sdk-go. Both are written in Go.

- [cadence-workflow/cadence](https://seerepo.com/r/cadence-workflow/cadence): Cadence is a distributed, scalable, durable, and highly available orchestration engine to execute asynchronous long-running business logic in a scalable and resilient way.
- [harness/harness](https://seerepo.com/r/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.

## What they share and what sets them apart

- In common: pq, Postgres, github.com/jmoiron/sqlx, github.com/golang-jwt/jwt/v5, golang.org/x/oauth2, github.com/aws/aws-sdk-go
- Only in cadence: go.mongodb.org/mongo-driver, sarama, github.com/gocql/gocql, MongoDB, github.com/olivere/elastic, github.com/ncruces/go-sqlite3, OpenSearch, MySQL, Kafka, Elastic, go.uber.org/fx, github.com/xdg/scram, mcp-go, gopkg.in/validator.v2, go.uber.org/zap
- Only in harness: chi, Gorilla, go-sqlite3, pgx, Redis, SQLite, github.com/jackc/pgerrcode, github.com/go-redsync/redsync/v4, github.com/golang-migrate/migrate/v4, github.com/hashicorp/golang-lru/v2, github.com/maragudk/migrate, Google, PostHog, React, react-router-dom, github.com/swaggest/swgui, github.com/Masterminds/squirrel, gopkg.in/mail.v2, github.com/yuin/goldmark, kin-openapi, github.com/swaggest/openapi-go, github.com/swaggest/jsonschema-go, github.com/rs/zerolog, Docker, github.com/drone-runners/drone-runner-docker, github.com/distribution/distribution/v3, Prometheus, github.com/go-logr/logr, github.com/go-logr/zerologr, github.com/sirupsen/logrus, classnames, Sass, @uiw/codemirror-themes-all, harnessio, @blueprintjs/core, Formik, React Table, CodeMirror, react-timeago, monaco-editor, react-keywords, diff2html, react-monaco-editor, react-hotkeys-hook, highcharts, react-complex-tree, react-intersection-observer, highcharts-react-official, monaco-yaml, react-split-pane, react-virtuoso, selecto, uiw, @harnessio/icons, iconoir-react, yaml, @uiw/react-markdown-preview, dompurify, mustache, react-pdf, hast-util-to-html, highlight.js, marked, rehype-external-links, rehype-sanitize, rehype-video, yup

## Side by side

| | cadence | harness |
|---|---|---|
| Size | 777,783 lines written, 1,051 code files | 591,817 lines written, 3,649 code files |
| Who writes it | 0.2% of its commits signed by AI. With GitHub Copilot, Claude Code, and Cursor | 0% of its commits signed by AI |
| Activity | Last push November 14, 2026, 5,945 commits, 9,556 stars | Last push November 12, 2026, 4,031 commits, 38,905 stars |
| Tests | 872 test files. 83.6% of its code files have a test that imports them | 502 test files. 21% of its code files have a test that imports them |

- Size: Lines written by people and agents, without generated ones; code files, without tests.
- Who writes it: A commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
- Activity: From GitHub and its history, on the day SeeRepo read it.
- Tests: The files that test the code, and the share of code files a test imports.

## Frequently asked questions

### Which is bigger, cadence or harness?

cadence, with 777,783 lines written; harness has 591,817.

The proof: [cadence-workflow/cadence's code at commit c2a373c](https://github.com/cadence-workflow/cadence/tree/c2a373c2b1ba246110658d03dc3be22438575692)

### Which has more GitHub stars, cadence or harness?

harness, with 38,905 stars; cadence has 9,556.

The proof: [harness/harness on GitHub](https://github.com/harness/harness)

### Which has more tests, cadence or harness?

cadence, with 872 test files; harness has 502.

The proof: [cadence-workflow/cadence's code at commit c2a373c](https://github.com/cadence-workflow/cadence/tree/c2a373c2b1ba246110658d03dc3be22438575692)

### Which was updated more recently, cadence or harness?

cadence: its last push was on November 14, 2026, and harness's on November 12, 2026.

The proof: [cadence-workflow/cadence's commits on GitHub](https://github.com/cadence-workflow/cadence/commits)

### Which has more commits signed by AI, cadence or harness?

cadence: an AI signed 0.2% of its commits, with GitHub Copilot, Claude Code, and Cursor.

## Sources

- cadence-workflow/cadence: Read on November 14, 2026, at commit c2a373c (https://github.com/cadence-workflow/cadence/tree/c2a373c2b1ba246110658d03dc3be22438575692)
- harness/harness: Read on November 14, 2026, at commit 85bc2b9 (https://github.com/harness/harness/tree/85bc2b9cd180a9e2cd2c6a6860c94b22f5eeaca2)

## What is your repo built with?

Any public repo, with no account: https://seerepo.com/r/owner/repo/built, with the owner and name it has on GitHub.