Issue #7 - 2026-10-15
Theme: Authentication — The Market Has Split
🎯 Deep Dive: Authentication in 2026 — Clerk vs Auth0 vs Better Auth vs NextAuth vs Kinde vs Supabase Auth
The “which auth library” question is obsolete. The market has fragmented into three categories: managed (ship fast, pay at scale), self-hosted (own your data, control costs), and platform-bundled (if you’re already there). Your constraints decide.
[Full deep dive content from /home/hermes/workspace/newsletter/content/drafts/deep-dive-authentication-2026.md]
Key Takeaways:
- Below 50K MAU, Clerk’s free tier makes pricing a non-issue. Above 50K, the gap opens violently — Clerk Pro hits ~$2,025/mo at 100K MAU while self-hosted Better Auth stays at ~$25–50/mo (DB only).
- The market has split by use case: Managed for speed (Clerk, Kinde), self-hosted for ownership/scale (Better Auth, Lucia), platform-bundled for integration (Supabase Auth).
- Most common 2026 migration: Clerk → Better Auth at 50K–100K MAU (2 engineer-weeks typical). Val Town documented theirs publicly.
⚡ Quick Hits
1. WorkOS — Enterprise SSO as a Layer, Not a Replacement
WorkOS sits IN FRONT of your auth provider (Clerk, Better Auth, NextAuth) and adds SAML, SCIM, Directory Sync, MFA. ~$150/mo. “We need enterprise SSO but like our current auth.”
🔗 Read more
2. Stack Auth — Next.js Native, Self-Hosted or Managed
Organizations, teams, RBAC built-in. Newer, smaller community. Could be Better Auth alternative for Next.js-only teams.
🔗 Read more
3. PocketBase — Backend-in-a-Box (Auth + DB + API + Admin UI)
Single Go binary, SQLite/Postgres. Auth + realtime DB + file storage + admin dashboard. Free, open source. Solo devs, prototypes, small apps wanting zero infra.
🔗 Read more
📊 Tool Comparison: Authentication Providers 2026
| Feature | Clerk | Kinde | Better Auth | NextAuth | Lucia | Supabase Auth | Auth0 |
|---|---|---|---|---|---|---|---|
| Price (Starter) | $0 (50K MAU) | $0 (7.5K MAU) | $0 (Self-hosted) | $0 (Self-hosted) | $0 (Self-hosted) | $0 (50K MAU) | $0 (7.5K MAU) |
| Free Tier | 50,000 MAU | ~7,500–10K MAU | Unlimited* | Unlimited* | Unlimited* | 50,000 MAU | 7,500–25K MAU |
| Key Differentiator | Best DX, pre-built UI | Orgs+RBAC+Billing+Flags included | Zero marginal cost at scale | Largest provider ecosystem | Minimalist, any framework | RLS = auth + data unified | Enterprise customization |
| Best For | Consumer apps, ship fast | B2B SaaS day one | Data ownership, compliance, scale | Existing NextAuth apps | Minimalist, specific needs | Supabase stack users | Enterprise, weird reqs |
| Our Verdict | Under 50K MAU, consumer | B2B complete platform | Scale + ownership | Maintain only | Build exactly what you need | If on Supabase | Dedicated identity team |
*Unlimited = limited only by your database hosting costs
🛠️ Build in Public: Newsletter Automation Pipeline
This issue was researched, drafted, and templated using the 2x/day cron automation. Firecrawl for research → local drafts → issue template → staged for approval. Next: Monitoring deep dive (Datadog vs Honeycomb vs Grafana vs SigNoz vs Highlight).
💡 Tip of the Week: Write an Auth ADR Before Committing
Title: Authentication Provider Selection
Date: 2026-10-15
Status: Proposed
Context:
- Project type: [B2B SaaS / Consumer / Internal tool]
- Target MAU at 12 months: [number]
- Team size: [number]
- Infra capacity: [Yes/No - can run Postgres + Redis]
- Compliance needs: [HIPAA / SOC2 / GDPR / None]
- Timeline to first auth: [days]
Decision: [Provider]
Rationale: [3 bullets max]
Risks: [2 bullets max]
Migration trigger: [e.g., “Re-evaluate at 50K MAU or $500/mo auth spend”]
Review quarterly. Auth decisions compound — migration cost grows with users.
🔗 Links Worth Clicking
- MakerKit: Better Auth vs Clerk vs NextAuth vs Supabase Auth (2026) — Best practical comparison with real migration costs
- Build MVP Fast: Auth Decision Tree for Next.js 2026 — Pricing at scale, decision flowchart
- Val Town: Migrating from Clerk to Better Auth — Real migration story
- Kinde: Top Authentication Providers 2025 Comparison — Comprehensive vendor comparison
- Better Auth Pricing — Official (simple: core free, Pro $20 for email/SMS)
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