o11y = observability · last checked 2026-10-28

The free tier is the product.
We watch it for you.

Free tiers and prices for 73 observability tools — 70 verified by hand from vendor pricing pages, diffed every week. 3 cuts and price hikes caught in 2026 so far. Get the next one in your inbox, free.

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✓ Every number sourced to the vendor’s page✓ Open methodology✓ Free JSON API✓ Not affiliated with any vendor
A real O11y Watch alert: UptimeRobot raised paid plans about 18% on 2026-10-24; annual Team went from $396 to $468 per year.
A real alert from our 2026-10-24 diff. Source ↗

How it works

01 · SNAPSHOT

We save every pricing page

73 vendor pricing pages, stored as text snapshots with the date we read them.

02 · DIFF + VERIFY

A weekly diff, checked by a human

An automated check re-reads each page; meaningful changes are reviewed and logged with a source link.

03 · ALERT

You hear before your invoice does

Free weekly email, or Pro for same-day alerts and CSV/JSON exports.

Why it matters

3

free tiers removed, sunset, or prices raised in 2026 that we logged with a source (UptimeRobot, Lunary, Highlight.io). See the log

+$72/yr

more for UptimeRobot Team on annual billing: $396 → $468 (+18%), detected by our 2026-10-24 diff. Source ↗

8

of 45 verified free tiers cap you at one user or seat. The real paywall is your second engineer.

What lands in your inbox

From: O11y Watch · Subject: O11y Watch #002 — UptimeRobot +18%, Lunary ends free signups

This week’s changes

  • Bugsnag: Free plan now listed as 1 user with 7.5K events and 1M spans per month (we previously recorded "solo users; 7 days retention"). Old snapshot was overwritten, so we cannot confirm whether this is a change or a fuller reading.
  • Uptrace: Cloud free tier stated as 50 GB and 5,000 timeseries per month; self-hosted Community Edition is free with no limits.
  • UptimeRobot: Paid prices rose ~18%: Team $39→$46/mo (monthly) and $33→$39/mo (annual); Scale $83→$98/mo (monthly) and $67→$79/mo (annual); annual Team $396→$468/yr. Free plan unchanged in our snapshot.

Free tier of the week: Axiom

500 GB/mo data loading compute; 10 GB-hours query compute; 25 GB storage; no card

Read the full sample issue →

73vendors tracked
70verified from pricing pages
45verified free tiers
11logged changes

Browse by category

APM & full-stack

14 vendors · 8 verified free

Logs

14 vendors · 3 verified free

Error tracking

10 vendors · 7 verified free

Uptime, cron & status pages

16 vendors · 13 verified free

On-call & incidents

7 vendors · 4 verified free

LLM observability

10 vendors · 9 verified free

Product analytics & replay

2 vendors · 1 verified free

Latest changes

  • · new tier
    Datadog — Infrastructure pricing adds a "Basic" host tier (contact sales, core system metrics, 15-month metric retention, no container monitoring; can be mixed with Pro or Enterprise hosts). The standalone Free card is gone; the FAQ now says the Free tier is up to five Basic hosts with 1-day retention. Pro $15/host ($18 on-demand) and Enterprise $23/host ($27 on-demand) unchanged. source ↗
  • · free tier detail
    Bugsnag — Free plan now listed as 1 user with 7.5K events and 1M spans per month (we previously recorded "solo users; 7 days retention"). Old snapshot was overwritten, so we cannot confirm whether this is a change or a fuller reading. source ↗
  • · free tier detail
    Uptrace — Cloud free tier stated as 50 GB and 5,000 timeseries per month; self-hosted Community Edition is free with no limits. source ↗
  • · price increase
    UptimeRobot — Paid prices rose ~18%: Team $39→$46/mo (monthly) and $33→$39/mo (annual); Scale $83→$98/mo (monthly) and $67→$79/mo (annual); annual Team $396→$468/yr. Free plan unchanged in our snapshot. source ↗
  • · free tier removed (new users)
    Lunary — Pricing page: "Payment is required to activate your workspace." Cloud starts at $20/user/mo; existing Free workspaces stay the same. source ↗
Full change log →

Biggest stated allowances

New Relic

Free tier

100 GB data ingest/mo; 1 free full platform user; unlimited basic users; $0.40/GB beyond

Axiom

Free tier

500 GB/mo data loading compute; 10 GB-hours query compute; 25 GB storage; no card

PostHog

Free tier

1M analytics events, 5K session recordings, 1M feature-flag requests/mo; 1 project; usage stops at limits

Uptrace

Free tier

Cloud: 50 GB and 5,000 timeseries free per month, then from $0.075/GB

FAQ

Where does the data come from?

From each vendor’s own public pricing page. We save a snapshot, a person records the plan limits (verbatim where possible), and every vendor page links to the source and shows the date it was checked. 70 of 73 vendors are verified so far; the rest are labeled Unverified.

How often is it updated?

An automated check re-reads every pricing page weekly. Meaningful changes are reviewed by hand and added to the public change log and RSS feed.

Is it free?

Yes. The directory, comparisons, change log, JSON API and weekly newsletter are free. Pro ($6/mo, cancel anytime) adds same-day alerts and CSV/JSON exports with full history.

Do vendors pay to be listed or ranked?

No. Sponsorships are always labeled and can’t change data, gotchas or picks. Some “Try it” links may be affiliate links; they are disclosed next to the link.

What counts as a pricing change?

Price increases or cuts, free tiers removed, shrunk or added, plan sunsets, and pricing pages that move. Each entry links to the page it came from.

Can my AI agent use this?

Yes — see /llms.txt and the free JSON API with an OpenAPI spec. No key needed.

Weekly newsletter · free

Know when a free tier shrinks — before your bill does.

One short email a week: every pricing-page change we detect across 73 tools, one opinionated take, and a free tier of the week. Unsubscribe anytime.

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