CATEGORY · 67 SERVICES

Authentication & security

Compare included quotas, restrictions and official provider documentation.

Free allowance

3 users free; 5 config syncs; 3 days of activity logs

Keep in mind

The ongoing Developer tier includes 3 users, 5 config syncs and 3-day audit activity logs. Each extra developer is $8/month. The separate Team tier has an introductory 14-day premium trial; do not classify that trial as expiry of Developer Free.

Free allowance

Auth0 Free: up to 25K monthly active users, 5 organizations, 1 custom domain and 1 enterprise connection

Keep in mind

No credit card is needed to sign up for Free, but custom domains require card verification. Free includes limited tenant and connection features; higher production limits and additional organizations are on paid plans. MAU quota is not an unlimited user allowance.

Free allowance

Clerk Hobby Free: 50K monthly retained users (MRU) per application, unlimited applications, up to 3 dashboard seats

Keep in mind

MRU counts retained users, not the same as monthly active users (MAU). Hobby needs no card; it has 1-day application-log retention, fixed 7-day sessions and limited impersonation. B2B add-on Free supports 100 monthly retained organizations with up to 20 members each; paid SSO/advanced controls are separate.

Free allowance

Up to 20 free Turnstile widgets/account; 10 configured hostnames/widget and unlimited verification challenges

Keep in mind

Turnstile Free can protect production websites, including small and medium businesses, independently of other Cloudflare services. Analytics lookback is limited to 7 days. Custom-branding removal, any-hostname widgets and ephemeral IDs are Enterprise-only; Free supports pre-clearance.

Free allowance

10.000 monthly active users; 2 projects; passkeys, passwords/passwordless, social SSO, MFA, custom domain

Keep in mind

Hosted in AWS Frankfurt; webhooks, Admin API, custom SMTP and team invites require Pro; repeated overage prompts upgrade. Commercial-use terms for cloud Free not independently confirmed.

Free allowance

5 projects; monthly limits: 200 Open Source tests, 100 Code tests, 300 IaC tests and 100 Container tests

Keep in mind

Designed for individual developers and small teams; private-repository scan quotas are enforced and recurring free-plan scans run weekly; commercial-use terms not explicitly confirmed.

Free allowance

1.000 monthly active users; 20 tenants; unlimited authorization queries; 3 environments; 25 roles

Keep in mind

Community is Free Forever for up to 1.000 MAU and 20 tenants. The 14-day audit-log retention advertised on the provider's payment comparison is a Pro feature, not a verified Community allowance; do not assume it is included in Free. Enterprise compliance, SSO and premium support require separate terms. Commercial-use rights remain unconfirmed.

Free allowance

2 users; 10 repositories; 2 container images; 1 domain; 1 cloud account; 10 AI AutoFixes/month; 250K protected requests/month

Keep in mind

Rescans every 3 days; premium PR security review, integrations, and extended coverage require paid tiers. Commercial-use terms not independently confirmed.

Free self-hosted software
Free allowance

Self-hosted Keycloak identity and access management with single sign-on, OAuth 2.0, and OpenID Connect.

Keep in mind

You run the identity server and database; secure TLS, upgrades, backups, and availability. Vendor hosting and enterprise support are not included.

Free self-hosted software
Free allowance

Self-hosted ZITADEL identity platform supporting authentication, organizations, OAuth 2.0, and OpenID Connect.

Keep in mind

Requires deployment, database, backups, and operational management. Verify current community-versus-cloud feature and license conditions.

Free self-hosted software
Free allowance

Self-hosted authentik identity provider for single sign-on, user management, and application access.

Keep in mind

Host the application and its supporting services yourself; configure secure access and backups. Enterprise features or managed offerings may cost extra.

Free self-hosted software
Free allowance

Self-hosted Authelia authentication and authorization gateway for protecting applications with SSO and multi-factor authentication.

Keep in mind

Requires an identity backend, reverse-proxy integration, and ongoing security maintenance. Hosting and delivery of external MFA messages are separate.

Free allowance

10.000 security requests/month after the 15-day trial; SDK-based protection for web and AI-agent requests

Keep in mind

The initial 15-day trial transitions to a capped ongoing Free plan. The current pricing page highlights paid Individual/Startup tiers; Free feature entitlements, card requirements and commercial-use rights are not separately specified. Do not assume paid-plan features or that usage above the cap is free.

Free allowance

Up to 1M monthly active users for AuthKit user management and authentication, including email/password, social sign-in, passkeys and MFA.

Keep in mind

A payment card is required before using a production environment; staging can be tested without a card. Enterprise SSO and Directory Sync cost from $125 per connection/month, custom domains $99/month, and each additional 1 million MAUs $2.500/month. Avoid paid features and overages.

Free self-hosted software
Free allowance

Apache-2.0 open-source self-hosted IAM/SSO; no per-user or monthly-active-user software fee; OAuth 2.0, OIDC, SAML, CAS, LDAP and MFA supported.

Keep in mind

Self-hosted only: operate and secure your own servers, database, upgrades, backups and identity integrations; hosting, SMS/email and infrastructure may cost extra. Casdoor Cloud is paid after its time-limited trial/credit; do not confuse with the perpetual self-hosted edition.

Free self-hosted software
Free allowance

Free-forever Apache-2.0 self-hosted policy decision point with YAML authorization policies, decision APIs, audit logs and Git/disk/cloud/DB policy storage; no vendor-enforced monthly decision or user quota.

Keep in mind

Requires your own hosting, security updates and operations. Cerbos Hub PoC has separate hosted limits (100 monthly active principals); Hub collaboration, managed policy delivery, enterprise features and support are not included.

Free self-hosted software
Free allowance

Free MPL-2.0 open-source secrets and encryption management; self-hosted secret engines, identity-based policies, audit devices and HTTP API; no software license quotas.

Keep in mind

Requires self-managed infrastructure, secure TLS, unsealing, key recovery, access policies and backups; hosting/operations cost extra. MPL-2.0 source distribution obligations apply to modified covered files.

Free self-hosted software
Free allowance

Apache-2.0 open-source fine-grained authorization server supporting relationship-based and attribute-based access control via HTTP/gRPC APIs; no vendor-imposed authorization-check or seat quota for self-hosted software.

Keep in mind

Provide and secure your own compute, persistent database, backups, TLS, monitoring and availability. In-memory storage is for development; use PostgreSQL or MySQL for production. Managed authorization offerings and infrastructure cost extra.

Free self-hosted software
Free allowance

Apache-2.0 self-hosted OpenID Connect identity and OAuth 2.0 provider with pluggable LDAP, SAML, GitHub and other upstream identity connectors; no software usage or seat fee.

Keep in mind

Dex federates to upstream identity providers rather than replacing user directories; configure TLS, secure token signing keys, storage and identity connectors yourself. Upstream identity services and hosting may charge separately.

Free self-hosted software
Free allowance

Apache-2.0 open-source identity server: self-host login, registration, recovery, verification, MFA and identity APIs without a per-user software license fee.

Keep in mind

Requires your own infrastructure, database, UI and email/SMS services; Ory Enterprise License is separate for enterprise features, guaranteed security patches, support and SLAs. Not the hosted Ory Network plan.

Free self-hosted software
Free allowance

Free Apache-2.0 self-hosted OAuth 2.0 / OpenID Connect server core for issuing tokens, client management, consent and login integration; no hosted-user quota.

Keep in mind

Requires a separate login/consent application, database and your own infrastructure. Ory recommends an enterprise agreement for business-critical deployments needing guaranteed CVE fixes, SLAs and advanced features; managed Ory Network is separate.

Free self-hosted software
Free allowance

Unlimited self-hosted OAuth2/OIDC authentication proxy instances and applications; no hosted identity-provider quota included

Keep in mind

MIT-licensed software; requires compatible OAuth2/OIDC provider, correct proxy/cookie configuration and self-managed infrastructure; identity-provider charges may apply.

Free allowance

MIT-licensed local CLI and CI tool to scan Git repositories, commits, files and history for accidentally exposed secrets, with no vendor-imposed repository or scan quota in the open-source tool.

Keep in mind

Detection can produce false positives and miss secrets; configure rules and review findings. Local scanning requires your own compute/CI infrastructure; hosted enterprise monitoring, if used, is separate. Found credentials must be revoked or rotated, not merely removed from Git.

Free allowance

Apache-2.0 open-source policy engine for API authorization, infrastructure and Kubernetes admission decisions; self-managed CLI, REST API and SDK use without vendor decision quotas.

Keep in mind

Policy authoring, testing, enforcement integration and hosting are operator responsibilities; OPA makes policy decisions but the calling service must enforce them. Managed policy platforms are separate.

Free self-hosted software
Free allowance

Apache-2.0 open-source runtime threat detection for Linux, containers and Kubernetes using configurable rules; no vendor software event quota for self-managed deployments.

Keep in mind

Requires host or cluster privileges and compatible kernel event collection; rule tuning, alert delivery, retention, SIEM integrations and infrastructure are operator-managed. Managed security services may charge separately.

Free self-hosted software
Free allowance

Free self-managed endpoint security, log analysis, threat detection and SIEM/XDR stack with Wazuh agent, server, indexer and dashboard; no hosted vendor event quota.

Keep in mind

Self-hosted infrastructure, storage, updates and security operations are required. Components have GPLv2/Apache-2.0 licensing obligations; the separately managed Wazuh Cloud offering is a trial or paid service.

Free allowance

Apache-2.0 open-source scanner for vulnerabilities, misconfigurations, secrets and software bills of materials across container images, code repositories, filesystems and Kubernetes, with no software-imposed scan quota.

Keep in mind

Requires your own compute, network access and vulnerability database updates; scanning results depend on available advisory data and require human triage. Hosted security services and optional integrations may be separately priced.

Free allowance

Apache-2.0 open-source self-managed identity-aware reverse proxy for application access policies and OIDC identity-provider integration; no software subscription or per-user vendor quota for Core.

Keep in mind

Operate TLS, DNS, IdP, certificates and deployment infrastructure yourself. Pomerium Zero managed control plane and Pomerium Enterprise governance features are separate offerings with their own terms and fees.

Free allowance

Apache-2.0 open-source Zanzibar-inspired fine-grained authorization database with self-managed API and relationship permissions; no per-check vendor quota in self-hosted software.

Keep in mind

Requires operating your own SpiceDB instance, datastore and authentication/authorization integration; infrastructure, backups, monitoring and optional AuthZed managed services are separate costs.

Free self-hosted software
Free allowance

BSD-2-Clause self-hosted OpenID Connect and OAuth 2.0 identity provider with passkey-only sign-in; no vendor-imposed user or login quota.

Keep in mind

Passkeys are required (no password fallback); deploy and secure your own server, HTTPS, backups and identity configuration. Hosting costs are not included.

Free allowance

MPL-2.0 self-hosted identity management with OAuth2/OIDC SSO, passkeys, LDAP gateway and Unix integration; no vendor-imposed user quota.

Keep in mind

Self-hosting requires your own infrastructure and operational security; LDAP gateway is read-only, and deployment/replication require configuration. MPL-2.0 obligations apply.

Free allowance

Apache-2.0 self-hosted private X.509 and SSH certificate authority with ACME issuance and automated renewal; no vendor-imposed certificate quota.

Keep in mind

Free open-source CA lacks several commercial Smallstep features, including turnkey multi-CA, high-availability and enterprise support; manage private keys and infrastructure yourself.

Free allowance

Free AGPL-3.0 Community Edition password and secret manager for teams, self-hosted with credential sharing and browser clients; no software subscription fee.

Keep in mind

Requires your own PHP/database server, TLS, email setup, backups and security updates. Cloud-hosted Passbolt is a separate paid service with only a short trial; paid enterprise capabilities are excluded. AGPL-3.0 source and trademark conditions apply.

Free self-hosted software
Free allowance

AGPL-3.0 open-source self-hosted web application firewall and reverse proxy with ModSecurity OWASP CRS, HTTPS automation and Docker/Kubernetes integrations; no vendor software usage quota.

Keep in mind

Bring your own server, networking and storage; secure WAF configuration, rule tuning, updates and operations remain your responsibility. Professional support and managed infrastructure are separate; AGPL-3.0 obligations apply.

Free allowance

Free $0/month managed infrastructure Starter for a self-hosted Better Auth application: 1 dashboard seat, 10.000 audit logs/month with 1-day retention and 1.000 security detections/month.

Keep in mind

This is optional managed infrastructure, not free hosting for your application or database. Starter is intended for evaluation and side projects; production-oriented features and longer retention require Pro. Card and commercial-use terms are not explicit.

Free allowance

Apache-2.0 CLI vulnerability scanning of container images, filesystems and SBOMs with no per-scan software license fee.

Keep in mind

Vulnerability database and target downloads need network access; findings depend on database freshness. Anchore Enterprise and commercial support are separate paid offerings.

Free self-hosted software
Free allowance

GPL-2.0 licensed daemon to ban repeated authentication failures using log-based filters; no software usage quota.

Keep in mind

Requires a compatible self-managed host, log access and firewall integration; server costs and ongoing security administration are not included. GPL redistribution obligations apply.

Free allowance

MPL-2.0 open-source local CLI encrypts YAML, JSON, ENV, INI and binary secrets using age, PGP or cloud KMS; no per-file software quota.

Keep in mind

Cloud KMS providers may charge for key operations; local age/PGP encryption avoids paid KMS. Safeguard private keys and plaintext, including CI logs and temporary files. MPL-2.0 redistribution obligations apply; SOPS does not provide hosted key management.

Free allowance

MIT-licensed local vulnerability scanner using community YAML templates for authorized HTTP, DNS, TCP, SSL and other security checks; no vendor software scan quota.

Keep in mind

Only scan assets you own or are explicitly authorized to assess. Treat third-party templates as untrusted checks; some may execute scripts or use headless browsers. Update the scanner/templates and throttle requests to avoid disruption. Hosted ProjectDiscovery services and CI compute are separate.

Free allowance

Apache-2.0 open-source CLI scans project dependencies, lockfiles and container images against known OSV vulnerabilities; no vendor software seat or scan quota.

Keep in mind

Run locally or in your own CI; CI compute and storage may cost extra. Online scans query OSV.dev/deps.dev with dependency metadata; offline mode needs downloaded databases. Guided remediation can execute package-manager scripts.

Free allowance

Free LGPL-2.1 local static code analysis engine with community rules, 30+ supported languages, no account required for basic scans and no vendor software scan quota.

Keep in mind

Semgrep-maintained rules have separate rules-license restrictions on competing SaaS and some commercial redistribution; LGPL engine license differs from rule licenses. Pro engine, supply-chain and secrets detection, hosted management and CI resources may cost extra.

Free allowance

Free GPL-2.0/GPL-3.0 cross-platform offline password manager for Windows, macOS and Linux, using encrypted KeePass-compatible local vault files, password generation and browser integration; no vendor account or password-count quota.

Keep in mind

Stores the vault locally; you must handle backups, device synchronization, recovery and security updates. No hosted password-sync service is included. GPL redistribution obligations apply to modified/distributed builds; hardware keys and optional cloud sync providers can cost extra.

Free allowance

Free GPL-3.0 Android HOTP/TOTP authenticator with encrypted local vault, biometric/password unlock, encrypted backups and no subscription or token-count limit.

Keep in mind

Android app runs locally and does not provide managed authentication hosting or cross-device cloud sync; backup and recovery are your responsibility. GPL-3.0 redistribution obligations apply; compatible with standard TOTP/HOTP services.

Free allowance

Apache-2.0 open-source CLI and Go library; generate SBOMs for container images, directories and archives without a vendor-enforced scan quota.

Keep in mind

Runs on your own computer or CI runner; compute, CI and container registry costs are separate. Syft generates SBOMs rather than performing a full vulnerability assessment; Anchore commercial support is optional.

Free allowance

Apache-2.0 open-source eBPF runtime security and observability for Linux and Kubernetes; no vendor-enforced agent or event quota.

Keep in mind

Requires a compatible Linux kernel and privileges for eBPF, with Kubernetes/host operations and telemetry storage paid by the operator; security policies need careful testing.

Free allowance

Apache-2.0 open-source local/CI scanner for infrastructure-as-code, container images and dependency misconfigurations; no vendor-imposed license seat or scan quota for the CLI.

Keep in mind

This is the free Checkov CLI, not the paid Prisma Cloud platform. CI runner, cloud accounts, remote integrations and third-party services may cost money; findings require manual review and remediation.

Free allowance

MIT-licensed self-hosted IDS/IPS security engine with behavioral detection, community detection scenarios and community blocklist; no vendor-enforced software license host or event quota for the engine.

Keep in mind

Requires your own Linux/Windows/Docker/Kubernetes infrastructure, log access, remediation integrations and security operations. Premium threat intelligence, paid blocklists and CrowdSec Console premium features are not included.

Free allowance

GPLv3 open-source Unix/Linux/macOS security auditing and system-hardening CLI with local checks and recommendations; no software scan or host quota.

Keep in mind

The free local scanner does not include Lynis Enterprise dashboards, centralized reporting, commercial support or host infrastructure; audits require suitable system permissions and operator review.

Free allowance

Apache-2.0 OR GPL-2.0 licensed SQL-based operating-system instrumentation and endpoint visibility for Linux, macOS and Windows; no software license fee or vendor-imposed query/endpoint quota.

Keep in mind

Run the agent and queries on your own endpoints; fleet management, centralized log storage, compute and commercial SaaS services are separate. Endpoint access and security permissions must be managed by the operator.

Free allowance

Apache-2.0 open-source CLI for scanning infrastructure-as-code templates and configuration files locally or in CI; no vendor-imposed license seat or scan quota for the OSS tool.

Keep in mind

The free KICS CLI is separate from paid Checkmarx products. Self-managed CI runners, cloud resources, third-party services and remediation work can cost money; findings need review.

Free allowance

Apache-2.0 open-source software composition analysis CLI, build plugins and Docker scanner; no software license fee or per-project scan quota.

Keep in mind

Requires vulnerability data downloads and Java 11+. An NVD API key is strongly recommended due to rate limits; optional Sonatype OSS Index/Guide analyzers require credentials and may have separate commercial terms. CI runners and infrastructure cost extra.

Free allowance

Apache-2.0 open-source command-line cloud security and compliance scanner for AWS, Azure, Google Cloud, Kubernetes, Microsoft 365 and GitHub; no Prowler OSS seat or scan quota.

Keep in mind

Requires your own machine and authorized cloud credentials. Provider API usage, log/storage and cloud resources can incur charges; Prowler Cloud managed platform and support are separate paid offerings. Review IAM permissions and scan impact.

Free allowance

Apache-2.0 open-source Kubernetes security CLI for scanning cluster configurations, YAML manifests, Helm charts and container images against compliance and vulnerability controls; no software seat or scan quota.

Keep in mind

Runs on your own workstation or CI and requires appropriate cluster access for live scans. Kubernetes compute, image registries and security feeds can incur separate costs; ARMO hosted services/support are not included. Use fix/patch commands only after review.

Free allowance

Apache-2.0 open-source Kubernetes/OpenShift X.509 certificate controller with automated issuance and renewal; no software licensing fee.

Keep in mind

Requires your own Kubernetes/OpenShift cluster and operational maintenance; issuer or CA rate limits and charges may apply, as may DNS, infrastructure and support. Not a hosted certificate service.

Free allowance

MIT-licensed local CLI for static analysis of GitHub Actions, Dependabot and pre-commit configurations; no vendor scan quota or software subscription fee.

Keep in mind

Runs locally or on user-provided CI runners. GitHub Actions runner minutes may cost money; optional GitHub code-scanning/SARIF upload can require GitHub Advanced Security for private repositories, but CLI scanning does not. This is not a hosted free security scanning service.

Free allowance

Free, self-hosted zero-trust access platform for VPN-like WireGuard/QUIC connectivity, identity-aware application gateways and policy-controlled private-resource access; open-source core has no vendor license fee or hosted-usage quota.

Keep in mind

Requires self-operated Kubernetes, compute, networking, DNS and storage, which can incur charges. Cluster/server components are AGPL-3.0, clients Apache-2.0; comply with AGPL network-use/source obligations. Enterprise-only features and alternative commercial licensing are separate paid offerings; no vendor-hosted free infrastructure is included.

Free allowance

Free self-hosted open-source core for WireGuard-based remote access, identity and access management, and authentication; no software subscription for the AGPL-licensed community components.

Keep in mind

Requires operator-provided server, network and WireGuard infrastructure. AGPL obligations apply to the open-source core; the enterprise directory and enterprise-only features are separately licensed. The paid Business/Enterprise offerings must not be confused with the free open-source core; consult official feature boundaries before deployment.

Free allowance

MIT-licensed self-hosted authentication gateway software with no published software usage quota or expiry; host your own Bun runtime and PostgreSQL.

Keep in mind

Production requires HTTPS, PostgreSQL, and configured Cloudflare Email Service and Twilio credentials for transactional email/SMS; provider messaging and infrastructure may incur charges. Redis recommended for multiple instances. No free hosted infrastructure included.

Free allowance

GPL-3.0-licensed lightweight self-hosted LDAP authentication and user-management server with web UI, SQLite/MySQL/PostgreSQL backends and no vendor subscription or published user quota for the core server.

Keep in mind

Runs on infrastructure you operate; server, database, backups, TLS, email delivery and maintenance may cost money. Intentionally does not implement all LDAP server features, and GPL-3.0 obligations apply to redistribution; no hosted free account or commercial support is included.

Free allowance

AGPL-3.0-licensed self-hosted MFA server and FreeRADIUS plugin with no technical core community-edition user limit; supports OTP, WebAuthn/FIDO2 and integrations with existing identity stores.

Keep in mind

Self-operated server, database, HTTPS, support and hardware/SMS/email delivery are not free. Some separately distributed integration plugins have user-count or subscription limits (including Windows Credential Provider and ADFS); AGPL-3.0 network-source obligations apply to modified deployments.

Free allowance

Apache-2.0-licensed self-hosted OpenID Connect/OAuth 2.0 identity provider with passkeys, admin UI and optional high availability; no vendor subscription or published self-hosted user quota.

Keep in mind

You must supply and secure your own host, TLS, backups, outbound email and any external dependencies; infrastructure is not free. Professional support is paid. LOCAL_TEST mode uses an unsafe demo configuration and must not be used in production.

Free allowance

Apache-2.0 self-hosted software for SBOM, CVE and license compliance management; no per-seat software license fee or published usage expiry. Deploy with Docker Compose or Helm.

Keep in mind

Self-hosted software only; provide your own compute, PostgreSQL, Redis, storage, HTTPS, backups and security maintenance. Vulnerability database updates and third-party scanner dependencies require network/resources; no free managed hosting is included.

Free allowance

Free MIT-licensed local Agent Skill for Debian/Ubuntu VPS setup, security hardening and read-only audits; no software usage quota or expiry published.

Keep in mind

Requires a compatible AI coding agent and an existing VPS; compute, model/API usage, backups and alert services are not included. Runs privileged server changes; review commands, retain console access and snapshots. Not a free hosted VPS.

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