Auth, security, product analytics & feature flags
19 providers and 78 verified findings for this front, as of 2026-10-22.
Comparison table
| Provider | Best offer | Audience | Findings H / M / L | Source |
|---|---|---|---|---|
| Amplitude Free Plan | Amplitude Free Plan (permanent free tier, not a trial) | free-for-all | 4 / 1 / 2 | amplitude.com |
| Auth0 Free Plan | Auth0 Free Plan (always-free tier) | free-for-all | 2 / 2 / 0 | auth0.com |
| Clerk Hobby Plan | Hobby Free Plan (free tier) | free-for-all | 3 / 0 / 0 | clerk.com |
| Countly | Countly Lite (Community Edition) — free self-hosted | free-for-all | 3 / 1 / 0 | countly.com |
| Firebase Authentication | Firebase Spark plan — free, no credit card | free-for-all | 5 / 3 / 0 | firebase.google.com |
| Flagsmith Free Plan | Free Cloud Plan (permanently free tier) | free-for-all | 3 / 1 / 0 | flagsmith.com |
| Keycloak | Self-hosted Keycloak Community (free tier equivalent) | free-for-all | 2 / 0 / 0 | keycloak.org |
| LaunchDarkly Developer Plan | Developer plan (free tier, renamed from 'Personal Use') | free-for-all | 2 / 2 / 0 | launchdarkly.com |
| LogRocket | 14-day free trial of all LogRocket features, no credit card | free-for-all | 1 / 2 / 1 | logrocket.com |
| Mixpanel Free Plan | Mixpanel Free Plan (free-forever tier) | free-for-all | 3 / 1 / 0 | mixpanel.com |
| OpenReplay | Open-Source self-hosted edition (free forever, no caps) | free-for-all | 2 / 2 / 1 | openreplay.com |
| Plausible | 30-Day Free Trial (no credit card) | free-for-all | 3 / 0 / 0 | plausible.io |
| PostHog Free Tier | PostHog Free Tier — monthly free allowances on every product | free-for-all | 4 / 2 / 0 | posthog.com |
| Sentry Developer Plan | Sentry Developer Plan (Free) — perpetual free tier | free-for-all | 3 / 0 / 0 | sentry.io |
| Simple Analytics Free Plan | Free plan (hobby tier), free forever | free-for-all | 4 / 0 / 0 | simpleanalytics.com |
| Statsig Developer Tier | Statsig free tier ("Developer" / free self-service tier) | free-for-all | 2 / 2 / 0 | statsig.com |
| Supabase Auth | Supabase Free Plan (free tier) — Auth, Postgres, Storage, Edge Functions, Realtime | free-for-all | 1 / 0 / 1 | supabase.com |
| Unleash | Unleash Open Source — free self-hosted server | free-for-all | 3 / 0 / 0 | getunleash.io |
| WorkOS AuthKit | User Management / AuthKit free tier: first 1,000,000 MAU free | free-for-all | 4 / 0 / 0 | workos.com |
Other service fronts
- LLM & AI model APIs, inference and agent platforms
- Startup cloud-credit programs (VC / accelerator funded)
- Managed databases & data platforms
- Frontend hosting, PaaS & app deployment
- VPS, bare-metal & dedicated servers
- Dev tools, IDEs, Git & CI/CD
- GPU, ML training & notebooks
- Observability, monitoring, uptime & CDN
- Email, SMS, push & chat APIs
- API marketplaces, free public APIs, search & CMS
- Payments & fintech dev tools
- University & education-only programs (.edu / student email)
- Self-hosted open-source alternatives that replace paid SaaS
- Extras: gap-fill finds and providers outside the 14 fronts