Clerk vs Datadog — Pricing, Plans, and Verified Costs (2026)
Clerk starts at $25/mo. Datadog starts at $18/mo. Datadog is $7/mo cheaper on the entry tier than Clerk.
How pricing works
These two tools don't price the same way, so the headline numbers below aren't directly comparable until you plug in your own volume.
- Clerk (Unknown model) — Clerk bills on a fixed plan from $25/mo, so the listed price is what you pay regardless of volume.
- Datadog (Per Usage) — Datadog bills on usage — host on top of a paid plan starting at $18/mo. The plan includes an allowance; anything beyond it is metered.
Per-minute, per-credit and per-token rates exclude any downstream model, speech or telephony costs unless the vendor states otherwise.
Modern authentication platform positioned as the alternative to Auth0 for React and Next.js developers. Distinctive for pre-built UI components (SignIn/SignUp forms) that install in one line — you don't build auth UI from scratch. Free tier bumped to 50K MAU in Feb 2026 (industry-leading). Pro $25/mo includes 1 SSO connection (WorkOS charges $125/mo for the same). Business $300/mo. Popular with Series A/B React startups.
The dominant cloud observability platform (metrics, logs, traces, APM), publicly traded (DDOG), ~$45B market cap. Positioned as the alternative to New Relic + Splunk + PagerDuty stitched together. Distinctive for its notorious usage-based pricing that has surprised engineering teams with 6-figure monthly bills (Coinbase's leaked contract was ~$65M/year in 2022). Priced by seat + host + volume across 20+ meters. Popular with engineering teams; feared by finance teams.
All plans compared
| Tier role | Plan | Clerk monthly | Clerk annual | Datadog monthly | Datadog annual |
|---|---|---|---|---|---|
| Free / starter | Free | Free | Free | Free | Free |
| Entry paid | Pro / Infrastructure Pro | $25 | $20 | $18 | $15 |
| Teams | Business / — | $300 | $250 | — | — |
| Enterprise | Enterprise / Infrastructure Enterprise | Custom | Custom | $27 | $23 |
Tier names differ across vendors. Rows are aligned by tier role, not name. Full tier structures on each tool's page.
What each is best for
Clerk is worth it if… js / React apps who want user management + social login + billing + orgs shipped in an afternoon — not weeks. Free tier covers up to 10K MAUs; Pro adds SSO, advanced features, and higher limits.
Datadog is worth it if… infrastructure teams (10+ engineers) that need APM + logs + metrics + synthetics + RUM in one platform — the observability default at mid-market and enterprise scale. Infrastructure covers hosts; APM, Logs, RUM, Synthetics, Database Monitoring each priced separately per module.
Bottom line: Similar positioning, closer to a preference call than a strategic one.
Choose Clerk over Datadog if…
Choose Clerk if…
- You're comfortable with Clerk's from $25/mo entry point.
- You match the profile Clerk is built for: the auth-as-a-service for developers building Next.
- You need a general-purpose developer & infrastructure option rather than a vertical-specific one.
Choose Datadog if…
- You want to pay only for actual usage (per usage, from $18/mo).
- You match the profile Datadog is built for: infrastructure teams (10+ engineers) that need APM + logs + metrics + synthetics + RUM in one platform — the observability default at mid-market and enterprise scale.
- You need a general-purpose developer & infrastructure option rather than a vertical-specific one.
At a glance
| Clerk | Datadog | |
|---|---|---|
| Free plan | Yes | Yes |
| Entry price | $25/mo | $18/mo |
| Enterprise available | Yes | Yes |
| Pricing model | — | Per Usage |
| Verification | Pricing under review | Pricing under review |
| Full pricing | View full pricing | View full pricing |
Pricing last verified September 26, 2026. Tracked daily.