Source: https://seerepo.com/compare/ory/hydra/vs/prometheus/prometheus Markdown source: https://seerepo.com/compare/ory/hydra/vs/prometheus/prometheus.md Description: hydra and prometheus share 10 technologies: golang.org/x/oauth2, OpenTelemetry, go.opentelemetry.io/otel/trace, go.opentelemetry.io/otel/sdk, go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp, go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp, github.com/prometheus/client_model, Prometheus, github.com/moby/moby/client, and go.opentelemetry.io/otel/exporters/otlp/otlptrace. Both are written in Go. # hydra vs prometheus hydra and prometheus share 10 technologies: golang.org/x/oauth2, OpenTelemetry, go.opentelemetry.io/otel/trace, go.opentelemetry.io/otel/sdk, go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp, go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp, github.com/prometheus/client_model, Prometheus, github.com/moby/moby/client, and go.opentelemetry.io/otel/exporters/otlp/otlptrace. Both are written in Go. - [ory/hydra](https://seerepo.com/r/ory/hydra): Internet-scale OpenID Certified™ OpenID Connect and OAuth2.1 provider that integrates with your user management through headless APIs. Solve OIDC/OAuth2 user cases over night. Consume as a service on Ory Network or self-host. Trusted by OpenAI and many others for scale and security. Written in Go. - [prometheus/prometheus](https://seerepo.com/r/prometheus/prometheus): The Prometheus monitoring system and time series database. ## What they share and what sets them apart - In common: golang.org/x/oauth2, OpenTelemetry, go.opentelemetry.io/otel/trace, go.opentelemetry.io/otel/sdk, go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp, go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp, github.com/prometheus/client_model, Prometheus, github.com/moby/moby/client, go.opentelemetry.io/otel/exporters/otlp/otlptrace - Only in hydra: net/http, pgx, ristretto, Postgres, github.com/dgraph-io/ristretto/v2, SQLite, github.com/cockroachdb/cockroach-go/v2, MySQL, github.com/gorilla/sessions, github.com/golang-jwt/jwt/v5, jsonwebtoken, govalidator, github.com/sirupsen/logrus, github.com/asaskevich/govalidator, go.opentelemetry.io/otel, github.com/jmoiron/sqlx, github.com/lestrrat-go/jwx, github.com/grpc-ecosystem/go-grpc-prometheus, go.opentelemetry.io/otel/exporters/zipkin - Only in prometheus: Consul, github.com/aws/aws-sdk-go-v2/service/rds, Google, go.opentelemetry.io/collector/component, Vite, React, react-router-dom, lru-cache, github.com/aws/aws-sdk-go-v2/credentials, github.com/Azure/azure-sdk-for-go/sdk/azidentity, github.com/prometheus/client_golang, github.com/aws/aws-sdk-go-v2/config, github.com/aws/aws-sdk-go-v2, github.com/aws/aws-sdk-go-v2/service/sts, github.com/moby/moby/api, github.com/Azure/azure-sdk-for-go/sdk/azcore, github.com/aws/aws-sdk-go-v2/feature/ec2/imds, go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc, go.opentelemetry.io/otel/metric, k8s.io/klog/v2, Mantine, CodeMirror, @uiw/react-codemirror, @floating-ui/dom, @lezer/highlight, react-infinite-scroll-component, @tabler/icons-react, highlight.js, sanitize-html, react-copy-to-clipboard, react-resize-detector, Font Awesome ## Side by side | | hydra | prometheus | |---|---|---| | Size | 114,964 lines written, 487 code files | 430,276 lines written, 607 code files | | Who writes it | 0.6% of its commits signed by AI. With Claude Code | 0.5% of its commits signed by AI. With Claude Code, Cursor, GitHub Copilot, and Codex | | Activity | Last push July 29, 2026, 4,477 commits, 17,649 stars | Last push November 4, 2026, 13,916 commits, 66,958 stars | | Tests | 268 test files. 52.4% of its code files have a test that imports them | 391 test files. 64.7% 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, hydra or prometheus? prometheus, with 430,276 lines written; hydra has 114,964. The proof: [prometheus/prometheus's code at commit 1e227c9](https://github.com/prometheus/prometheus/tree/1e227c985bf727258ca2d8d5826cd12f48b16888) ### Which has more GitHub stars, hydra or prometheus? prometheus, with 66,958 stars; hydra has 17,649. The proof: [prometheus/prometheus on GitHub](https://github.com/prometheus/prometheus) ### Which has more tests, hydra or prometheus? prometheus, with 391 test files; hydra has 268. The proof: [prometheus/prometheus's code at commit 1e227c9](https://github.com/prometheus/prometheus/tree/1e227c985bf727258ca2d8d5826cd12f48b16888) ### Which was updated more recently, hydra or prometheus? prometheus: its last push was on November 4, 2026, and hydra's on July 29, 2026. The proof: [prometheus/prometheus's commits on GitHub](https://github.com/prometheus/prometheus/commits) ### Which has more commits signed by AI, hydra or prometheus? hydra: an AI signed 0.6% of its commits, with Claude Code; in prometheus, 0.5%. The proof: [the commits each tool signed in ory/hydra](https://seerepo.com/r/ory/hydra/ai) ## Sources - ory/hydra: Read on November 6, 2026, at commit 4174065 (https://github.com/ory/hydra/tree/4174065ffb052799890f7480f5360a877a67ffc1) - prometheus/prometheus: Read on November 5, 2026, at commit 1e227c9 (https://github.com/prometheus/prometheus/tree/1e227c985bf727258ca2d8d5826cd12f48b16888) ## 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.