Auth0 vs Supabase(2026)
Auth0 is better for teams that need enterprise-grade. Supabase is the stronger choice if full postgres with sql. Auth0 is freemium (from $23/month) and Supabase is freemium (from $25/month).
Full feature breakdown, pricing details, and pros & cons below.
By Bikram NathLast updated
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Auth0
Auth0 is an identity platform for web, mobile, and IoT with support for social logins, SSO, and more.
Starting at $23/month
Visit Auth0Supabase
Supabase is an open source Firebase alternative providing a Postgres database, Auth, realtime, storage, and edge functions.
Starting at $25/month
Visit SupabaseHow Do Auth0 and Supabase Compare on Features?
| Feature | Auth0 | Supabase |
|---|---|---|
| Pricing model | freemium | freemium |
| Starting price | $23/month | $25/month |
| Universal Login | ✓ | — |
| Social connections | ✓ | — |
| MFA | ✓ | — |
| SSO | ✓ | — |
| Machine-to-machine auth | ✓ | — |
| Rules/Actions | ✓ | — |
| PostgreSQL | — | ✓ |
| Authentication | — | ✓ |
| Realtime | — | ✓ |
| Storage | — | ✓ |
| Edge Functions | — | ✓ |
| Auto-generated APIs | — | ✓ |
Auth0 Pros and Cons vs Supabase
Auth0
Supabase
Deep dive: Auth0
When to choose Auth0
Auth0 is the right choice for enterprise SaaS, regulated industries (healthcare, fintech), and teams needing compliance coverage (SOC 2, HIPAA, GDPR documentation). If your target customers are Fortune 500 companies that demand SAML, you'll eventually need Auth0's integrations and compliance posture. Also pick Auth0 if you're building for 50k+ users and need multi-tenant isolation, custom auth rules, or passwordless flows alongside traditional login. The large ecosystem and third-party integrations (Okta connectors, custom databases, Lambda hooks) justify the cost. Don't choose Auth0 if you're a solo dev or small team with <10k users—the learning curve and minimum spend ($23/mo) make simpler platforms smarter. Auth0 is also the wrong pick if you hate vendor lock-in or need complete authentication control; their Rules engine and passwordless flows are opinionated and hard to migrate away from. Skip Auth0 if you're building a consumer app where price-per-user matters; MAU-based pricing becomes painful fast as you scale beyond 100k users.
Real-world use case
A Series B SaaS (40 employees, 25k active users) migrated from Clerk to Auth0 because enterprise customers demanded SAML SSO and AD/OKTA sync. Setup took 3 weeks, not 3 days—they needed custom Rule logic to map SAML attributes to their user schema, configure custom domains for white-label login pages, and integrate with Salesforce for provisioning. Monthly bill: $420 (250k MAU plan). Their passwordless flows (magic links, SMS OTP) saved them from building 2-factor auth from scratch. The ROI showed up when they closed a $500k deal with a Fortune 500 company—the enterprise customer required SOC 2 compliance documentation, which Auth0 provided in a pre-audited security report. The tradeoff: they spent 40 hours on config and custom Rule debugging instead of shipping product features. But the integrations (Datadog logging, Slack webhooks, custom database migrations) meant they didn't build authentication scaffolding.
Hidden gotchas
Auth0's Rules engine—powerful but infamous for silent failures. A typo in a Rule means users can't log in, but error messages are cryptic. Rules execute sequentially and have a 10-second timeout; exceed it and authentication silently fails without alerting you. Another gotcha: custom domains cost $10/month extra and require DNS validation that often fails mysteriously in staging. Recovery codes are not documented in the dashboard UI—users often forget them and lock themselves out. Password reset emails sometimes land in spam because Auth0 doesn't DKIM-sign transactional emails by default. Pricing cliff: Auth0 charges per *active* MAU, not total users, but their definition of 'active' is opaque—logins, API calls, and passwordless flows all count differently. A migration gone wrong once cost a company $8k in overage charges after they imported legacy user databases (marked as 'active' during import). Session management is another surprise: Auth0 invalidates sessions after 7 days by default, and if users don't explicitly log out, zombie sessions bloat your MAU count. Lastly, migration tools from legacy auth systems are finicky—custom databases with hashed passwords often require a manual backfill, and their migration docs assume you have SHA256 hashes (good luck if you have bcrypt).
Pricing breakdown
Auth0 by Okta offers a free plan with 7,500 MAU and 2 social connections. The Essentials plan starts at $35/mo for up to 500 MAU with unlimited social connections and custom domains. The Professional plan starts at $240/mo for up to 1,000 MAU with MFA, breach detection, and log streaming. Pricing scales per-MAU: at 10,000 MAU, expect $700-1,200/mo on Professional. The Enterprise plan is custom-priced. The main cost trap: MAU-based pricing means costs scale directly with user growth, making Auth0 expensive for consumer apps with millions of free users.
Deep dive: Supabase
When to choose Supabase
Choose Supabase if you're building modern applications that need real-time features (live collaboration, chat, notifications), PostgreSQL SQL queries, and built-in auth without Firebase's vendor lock-in. It's ideal for startups and solo devs—the free tier is genuinely useful: 500MB database, 1GB file storage, and 50K monthly auth events. The open-source architecture means you can self-host if Supabase ever becomes too expensive or unreliable. Supabase is the WRONG choice for static sites, simple blogs, or projects that don't need a database—you're overpaying for a data engine. The free tier has gotchas: projects pause after 1 week of inactivity, so it's not suitable for production apps unless you pay. Edge functions are limited (Node.js-only, limited dependencies), so if you need Python or heavy compute, look at Vercel or Lambda. Real-time subscriptions are great for user-facing features but add complexity and can get expensive at scale ($4/month per 1M realtime events).
Real-world use case
A founder built a real-time collaborative whiteboard app using Supabase's free tier: PostgreSQL for drawing data, auth for user management, and realtime subscriptions for live syncing. Development took 3 weeks because Supabase's JavaScript client made auth + database + realtime easy. Launch day: 200 beta users, freemium model (5 boards per user, pay $5/month for unlimited). Month 1 costs: $0 (free tier). Month 2: traffic exceeded free tier limits (database grew to 600MB); upgraded to Pro ($25/month). At 500 paid users ($5/month each), revenue was $2,500/month; Supabase cost was $25/month. The pricing math worked beautifully. If she'd used Firebase, vendor lock-in would've been higher, and Postgres SQL flexibility would've been lost. The real-time feature (10K concurrent users syncing) cost her an extra $200/month in realtime events by month 6, but that was still <1% of revenue.
Hidden gotchas
Supabase's free tier pauses projects after 7 days of inactivity—projects are frozen, databases reset, and cold starts hurt. Many developers are shocked to find their free project gone after a vacation. Pro tier pricing ($25/month) includes 500K realtime events; overages are $0.04 per 100K events—a popular app hits $500+ in surprise overages. Database backups on free tier are limited to the last 7 days; Pro tier gets 30 days. Restore operations aren't self-service; they require support tickets. Self-hosting Supabase is documented but complex: you need Docker, Kubernetes, and 2+ hours of setup. The authentication defaults are opinionated—if you need SAML, LDAP, or non-standard OAuth flows, you'll hit limitations. Edge functions (Deno-based) have strict limits: 10 second timeout, no native PostgreSQL connection pooling, and dependency issues (some npm packages won't work). Row-level security (RLS) is powerful but has a learning curve; misconfigured policies silently fail, returning empty rows instead of errors. Realtime subscriptions aren't designed for high-frequency updates (>100Hz); you'll hit performance cliffs. Rate limiting for APIs isn't clearly documented; high-concurrency apps might get throttled unexpectedly. Cold starts on edge functions are 1-2 seconds, much slower than Vercel.
Pricing breakdown
Supabase's free plan includes 500 MB database, 1 GB file storage, 50 MB bandwidth, and 500K Edge Function invocations. The Pro plan at $25/mo adds 8 GB database, 100 GB file storage, and 250 GB bandwidth. Beyond included limits: database is $0.125/GB, bandwidth is $0.09/GB, storage is $0.021/GB. At moderate scale (50K MAU, 20 GB database), expect $40-80/mo. The advantage: Postgres + Auth + Storage + Edge Functions bundled at roughly 60% the cost of running separate services. The cost trap: database compute is tied to your plan tier — CPU-heavy queries on the free/Pro plans hit performance ceilings.
Should You Use Auth0 or Supabase?
For most teams, Auth0 is the better default: it offers enterprise-grade and is freemium (from $23/month). Choose Supabase instead if full postgres with sql matters more than complex for simple use cases. There is no universal winner — the right pick depends on your budget, team size, and whether you value enterprise-grade or full postgres with sql more.
Choose Auth0 if…
- •Enterprise-grade
- •Highly customizable
- •Excellent docs
Choose Supabase if…
- •Full Postgres with SQL
- •Built-in auth and storage
- •Open source