Datadog vs Vellum — Pricing, Plans, and Verified Costs (2026)
Datadog starts at $18/mo. Vellum starts at $30/mo. Datadog is $12/mo cheaper on the entry tier than Vellum.
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.
- 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.
- Vellum (Tiered) — Vellum bills on a fixed plan from $30/mo, so the listed price is what you pay regardless of volume.
Per-minute, per-credit and per-token rates exclude any downstream model, speech or telephony costs unless the vendor states otherwise.
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.
Personal AI assistant that runs your tasks in a hosted environment. Plans priced by 'computer size' (small/medium/large) and included storage (10/30/60 GB), with each tier bundling usage. Higher tiers add an Assistant email and dedicated subdomain. Custom Plan builds a bespoke fit for heavier workflows. Vellum pivoted to this consumer-friendly assistant product in 2026 after operating as an LLMOps platform earlier.
All plans compared
| Tier role | Plan | Datadog monthly | Datadog annual | Vellum monthly | Vellum annual |
|---|---|---|---|---|---|
| Free / starter | Free / Start Free | Free | Free | Free | Free |
| Entry paid | Infrastructure Pro / Mighty | $18 | $15 | $30 | $30 |
| Mid tier | — / Super | — | — | $100 | $100 |
| Pro / power | — / Ultra | — | — | $200 | $200 |
| Enterprise | Infrastructure Enterprise / Custom | $27 | $23 | Custom | Custom |
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
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.
Vellum is worth it if… individuals who want a persistent AI assistant that can execute multi-step tasks, keep files in a hosted workspace, and be reached via a custom email or subdomain. Mighty $30 suits casual daily use; Super $100 adds email/subdomain features for prosumers; Ultra $200 targets power users who lean on the assistant heavily.
Bottom line: Choose based on how you want to pay — Datadog is per usage, Vellum is tiered.
Choose Datadog over Vellum if…
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.
Choose Vellum if…
- You want fixed-price predictability (tiered, from $30/mo).
- You match the profile Vellum is built for: individuals who want a persistent AI assistant that can execute multi-step tasks, keep files in a hosted workspace, and be reached via a custom email or subdomain.
- You need a general-purpose developer & infrastructure option rather than a vertical-specific one.
At a glance
| Datadog | Vellum | |
|---|---|---|
| Free plan | Yes | Yes |
| Entry price | $18/mo | $30/mo |
| Enterprise available | Yes | Yes |
| Pricing model | Per Usage | Tiered |
| Verification | Pricing under review | Checked September 29, 2026 |
| Full pricing | View full pricing | View full pricing |
Pricing last verified September 29, 2026. Verification cadence varies by tool; check each tool page.