Best Error Tracking Tools of 2026

AppSignal is the Netherlands-resident pick for European customers who can't legally ship error data to US-based vendors. Bootstrapped indie since 2012 from Amsterdam, with strong Ruby, Elixir, and Node SDK heritage and first-class Phoenix integration.

Free is 50,000 requests. Small is $23 a month with 250,000 requests and 1GB of logs. Medium is $49 with 1 million requests and 5GB. Large is $109 with 5 million requests and 20GB. XLarge is $209 with 10 million requests and 40GB.

The unusual thing about AppSignal's plan structure is that all features are available on every plan; only the quota differs. So Small at $23 already includes uptime, cron, AI grouping, and SAML SSO. The 10 percent annual discount was restored in 2024, and the 'Relaxed Upgrade Policy' means no surprise overage fees and a 28-day notice before upgrade.

The mobile SDK ecosystem is weaker than Sentry or BugSnag; if you build mobile apps, this is not the right pick. Page score uses Medium $49 as the typical against the realistic $23 Small entry.

Sentry is the default error tracker for most teams and the brand reference for the entire category, with around 100,000 organizations using it as of 2024.

Developer is free. Team is $26 a month with 50,000 errors. Business is $80 a month and adds SAML SSO, SCIM, 90-day insight lookback, and an audit log. Enterprise is custom. The realistic small-team buyer pays Team; the SOC 2 customer pays Business because procurement requires SAML and audit logs.

Our scoring picks Business at $80 as the typical because the heuristic can't recognize the Developer/Team/Business names and falls back to the second-cheapest paid tier, a 208 percent overshoot from the realistic Team entry. The cons block acknowledges that explicitly. Sentry shifted from BSL to a Functional Source License in 2024, which some procurement teams consider non-OSI; if that matters, GlitchTip is a Sentry-SDK-compatible MIT-licensed drop-in.

GlitchTip is the MIT-licensed Sentry-compatible alternative, built after Sentry shifted from BSL to FSL and some companies considered the new license non-OSI. The killer feature is that existing Sentry SDK clients (sentry-python, @sentry/react, sentry-ruby, sentry-cocoa) work as drop-in replacements pointed at the GlitchTip server. Migrate by swapping the DSN environment variable. No code rewrites.

Single Docker image self-hostable on customer infrastructure. Founded in 2020 by Burke Software in Brooklyn, bootstrapped indie. OSS is free forever (you pay infrastructure costs only). Cloud Free is 1,000 events. Cloud Small is $15 a month with 100,000 events and Slack, Discord, and webhook integrations. Cloud Medium is $50 a month with 500,000 events and 90-day retention. Cloud Small at $15 is the cheapest paid SaaS in this lineup.

The trade-off vs Sentry: no AI grouping, no session replay, no mobile SDKs (errors and uptime baseline only), and the integration catalog is smaller. Page score uses Cloud Medium $50 as the typical vs the realistic Cloud Small $15 entry.

Honeybadger is the small-team pick that bundles error tracking, uptime monitoring, and cron checkins into one $26 a month Small tier. Sentry charges separately for Crons (a $5-plus add-on); AppSignal charges separately for Uptime; Rollbar offers no uptime at any tier. The all-in-one bundle is load-bearing for small Ruby teams that want one bill for ops monitoring.

Bootstrapped indie since 2012, no VC dilution risk, and well-known in the Ruby and Rails community for the SDK heritage. Small at $26 covers 50,000 errors and 12 projects, enough for most bootstrapped SaaS. Medium at $79 covers 300,000 errors and 25 projects with custom domain checkins. Large at $209 covers 1.5 million errors and adds an audit log.

The realistic small-team buyer pays Small; the page score uses Medium as the typical, which is a 204 percent overshoot. The non-Ruby SDK ecosystem is weaker than Sentry; mobile, Go, and Rust support is second-class.

Rollbar is the mature alternative to Sentry, often picked by mid-market organizations that find Sentry's pricing model confusing or want a more conservative vendor. Acquired by Insight Partners in 2022, which signals long-term enterprise stability.

Free is 5,000 events. Essentials at $24 a month covers 50,000 events with 30-day retention. Advanced at $89 a month unlocks AI grouping (dedupes similar errors automatically), audit log, and workflow rules that auto-route errors to Slack, Jira, or GitHub. Enterprise adds SAML SSO, RBAC, and a premium SLA.

Rollbar is errors-only: no session replay, no uptime, no cron checkins. If you want any of those, you're combining Rollbar with another tool. The realistic small-to-mid-market buyer pays Essentials; the upgrade where AI grouping pays off is Advanced, which is also where most series-B SaaS scale-ups land. Page score reflects Advanced as the typical (a 271 percent overshoot from Essentials).

BugSnag is the mobile crash reporter, with native SDKs for Android, iOS, React Native, Flutter, and Unity. The stability score dashboards are the signature feature: instead of just showing the error count, BugSnag shows what percentage of sessions and users are crash-free, which is the actual KPI mobile teams report against.

SmartBear acquired BugSnag in 2021 for around $200 million, which signals an enterprise-stable parent for testing-stack readers. Free is 7,500 events. Lite is $59 a month with 150,000 events and 5 users. Plus is $208 a month with 500,000 events, unlimited users, and stability scores. Premium is $416 a month with 1 million events and SAML SSO.

The 'Lite' tier name is treated as a budget tier that the heuristic disqualifies, so the page score lands on Plus at $208, the largest gap in this category at 252 percent over the realistic Lite entry of $59. The web SDK exists but the mobile-app crash flow is the actual differentiator. EU data residency is selectable.

Highlight.io is the session-replay-primary pick. The pitch is that the replay shows DOM events plus console plus network calls, all synchronized with the error timeline, so you can see exactly what the user did before the crash. Founded in 2022 (Y Combinator W22), Apache 2.0 licensed open-source-core, with a self-hosted enterprise option.

Free is 500 sessions, 1,000 errors, and 15-day retention. PAYG is $5 per 1,000 sessions, $1 per 1,000 errors, $0.20 per GB of logs. Pro is $150 a month with 50,000 sessions, 180-day retention, and unlimited team. Enterprise adds SAML and self-hosted. The PAYG model is genuinely useful if your traffic is bursty and you want linear scaling; most session-replay vendors price in event buckets that punish under- or over-provisioning.

OpenTelemetry-native, with first-class Next.js and React. The trade-off is that Pro at $150 is roughly 5 times Sentry Team at $26; session replay is the premium feature here. There is no AI grouping, and the integration catalog is smaller than Sentry or Rollbar.