Clerk alternatives

Clerk is listed under Dev Tools: Authentication and user management for web apps. We compare it with 15 other Dev Tools tools that have researched data. 15 of them offer a free plan or are free to use (7 open source), and 0 are paid only. Clerk itself is freemium (free plan + paid tiers).

Order: Sorted by how much you can use for free (free or open source first, then free plan with paid tiers, then paid only), then by the number of documented features, then alphabetically. No ratings or reviews are used.

Tool	Pricing	Free tier	Key features	Who it's for
Clerk this tool	Freemium (free plan + paid tiers) Paid plans from $25/month	Yes	Sign-in, profiles, passwords, magic links, and one-time codes Social sign-on with more than 20 providers Organizations with roles, invitations, and domain auto-join	Developers adding authentication and user management to web and mobile apps.
GridCraft	Free and open source	Yes	XLSX is the native format, including styles, formulas, tables, charts, and PivotTables 500+ worksheet functions, plus dynamic arrays, LET, and LAMBDA Native apps for macOS, Windows, Linux, and BSD, plus the browser	People who want an open-source spreadsheet, including agents that edit workbooks.
Agent Toolkit for AWS	Free No additional charge; pay only for AWS resources	Yes	Auto-detects your agents, installs skills, and configures the MCP server Managed MCP server for AWS CLI commands, docs search, and curated skills Covers 300+ AWS services and 15,000+ API actions through one tool	Developers whose coding agents build and manage applications on AWS.
DigUp	Free and open source	Yes	Searches photos, PDFs, documents, recordings, video, and code by what is in them Runs entirely on your computer on Mac, Windows, and Linux Uses Google DeepMind's EmbeddingGemma 2 across text, image, audio, and video	People who want to search the files on their own computer.
GPTibo	Free and open source	Yes	Storefront for products, checkout, orders, and after-sales requests Admin for pricing, orders, refunds, partners, and notifications Partner desk with its own shop, branding, and custom domain	Developers self-hosting a digital-goods shop.
Docker	Freemium (free plan + paid tiers) Paid plans from $11/user/month	Yes	Package apps as containers, then share and run them Run each coding agent in an isolated microVM Find and publish container images on Docker Hub	Individual developers, teams, and enterprises that build and run containers and coding agents.
Grafana	Freemium (free plan + paid tiers)	Yes	Combines metrics, logs, traces, profiles, and business data Assistant reads production telemetry to speed root-cause work Aggregates lower-priority telemetry and can cut costs 80%	For individual teams and organizations, from startups to the Fortune 500, that need observability.
Infisical	Freemium (free plan + paid tiers)	Yes	Sync, rotate, and audit application secrets across environments Limit secret access by environment, path, and identity Issue, renew, and revoke certificates from private CAs	Developers, machines, and AI agents that manage secrets, certificates, and privileged access.
Neon	Freemium (free plan + paid tiers)	Yes	Serverless Postgres with branching and separate storage and compute Managed user authentication included in every database Serverless functions that run beside the database	For developers building apps and agents that need a Postgres backend.
Redis	Freemium (free plan + paid tiers)	Yes	Sub-millisecond reads and writes for caching Event-driven messaging and data pipelines Persistent storage for application sessions	Developers building real-time apps and AI agents.
Sentry	Freemium (free plan + paid tiers) Paid plans from $26/month	Yes	Monitor errors, logs, traces, replays, profiles, and metrics together Replay failed fetches and trace slow requests to the code AI debugger drafts merge-ready patches from logs and traces	Developers and software teams monitoring application errors and performance.
Supabase	Freemium (free plan + paid tiers) Paid plans from $25/month	Yes	Every project includes a full Postgres database User sign-ups and logins with row level security Deploy custom code as edge functions without managing servers	Developers and teams building applications on Postgres.
HatchZip	Free and open source	Yes	Extracts ZIP, 7z, and tar from the end, then cuts each finished part off the archive Reads ZIP, ZIP64, 7z, tar, .tar.gz, and split archives Checks that the extraction will fit before it changes anything	People extracting a large archive on a disk that cannot hold the archive and the files at once.
open_scion	Free and open source	Yes	Clients fetch single objects and sparse trees instead of a full clone Blame, path history, and code search run on the server Lands a change with compare-and-swap instead of a merge queue	Developers running source control for coding agents.
Security Audit Skill	Free and open source	Yes	Runs reconnaissance, coverage-led hunting, candidate validation, and structured output Independent agents verify records, then reports are derived from those records Writes confirmed, needs_validation, and rejected records to findings.json	Developers who want a coding agent to audit a repository and keep machine-readable findings.
SkillSpector	Free and open source	Yes	Scans Git repositories, URLs, zip files, directories, or a single file Runs static checks and can add optional LLM semantic analysis Writes terminal, JSON, Markdown, or SARIF reports	Developers reviewing an AI agent skill before they install it.

Clerk alternatives: FAQ

What are the best Clerk alternatives?

GridCraft, Agent Toolkit for AWS, DigUp, GPTibo, Docker, Grafana, Infisical, Neon, Redis, Sentry, Supabase, HatchZip, open_scion, Security Audit Skill, SkillSpector are the Clerk alternatives in our directory that have researched data. They are ordered by how much you can use for free, then by documented features. No ratings or reviews are used, so the order is not a quality ranking.

Is there a free alternative to Clerk?

GridCraft (free and open source), Agent Toolkit for AWS (free), DigUp (free and open source), GPTibo (free and open source), Docker (freemium (free plan + paid tiers)), Grafana (freemium (free plan + paid tiers)), Infisical (freemium (free plan + paid tiers)), Neon (freemium (free plan + paid tiers)), Redis (freemium (free plan + paid tiers)), Sentry (freemium (free plan + paid tiers)), Supabase (freemium (free plan + paid tiers)), HatchZip (free and open source), open_scion (free and open source), Security Audit Skill (free and open source), SkillSpector (free and open source). Free tiers can change, so check each site.