Directory
73 vendors. “Unverified” means we have a page snapshot but haven’t hand-checked the plan yet — treat as unknown.
Directory changes weekly
Free tiers move. Get each change with its source, once a week.
| Vendor ↕ | Category ↕ | Free ↕ | What you get free | Checked ↕ |
|---|---|---|---|---|
| Airbrake | Error tracking | No free tier | Free trial; credit card required to start | 2026-10-24 |
| AppSignal | APM & full-stack | Free tier | 30K requests; 1 GB logging; 5-day retention | 2026-10-24 |
| Arize AX / Phoenix | LLM observability | Free tier | 25k spans/mo; 1 GB/mo; 10 issues/mo; no card. Phoenix is open source | 2026-10-24 |
| Atatus | APM & full-stack | No free tier | 14-day free trial; custom pricing | 2026-10-24 |
| Atlassian Statuspage | Uptime, cron & status pages | Free tier | 100 subscribers; 25 components; 2 team members; 2 metrics; email notifications | 2026-10-24 |
| Axiom | Logs | Free tier | 500 GB/mo data loading compute; 10 GB-hours query compute; 25 GB storage; no card | 2026-10-24 |
| Better Stack | Uptime, cron & status pages | Free tier | 10 monitors & heartbeats; 1 status page; Slack & email alerts | 2026-10-24 |
| Braintrust | LLM observability | Free tier | $0/month; $10 credits; free usage for traces, evals and whole team; no card | 2026-10-24 |
| Bugsink | Error tracking | Free tier | 15K monthly events; single user; 5K events retained. Self-hosted: unlimited users, all features | 2026-10-24 |
| Bugsnag (Insight Hub) | Error tracking | Free tier | 1 user; 7.5K events and 1M spans/mo | 2026-10-24 |
| Checkly | Uptime, cron & status pages | Free tier | $0; hard-capped at 10k API check runs and 1k browser check runs | 2026-10-24 |
| Coralogix | Logs | No free tier | 14-day free trial (8 units quota); usage-based from $0.42/GB logs | 2026-10-24 |
| Cronitor | Uptime, cron & status pages | Free tier | 5 monitors; email & Slack alerts; basic status page | 2026-10-24 |
| Dash0 | APM & full-stack | No free tier | 14-day unlimited free trial only | 2026-10-24 |
| Datadog | APM & full-stack | Free tier | Up to 5 hosts; 1-day metric retention; core collection & visualization | 2026-10-24 |
| Dynatrace | APM & full-stack | No free tier | Free trial only ("Try it free") | 2026-10-24 |
| Elastic Observability | Logs | No free tier | Free trial of Elastic Cloud (serverless/hosted); self-managed option | 2026-10-24 |
| Exceptionless | Error tracking | Free tier | $0; 3,000 events/month | 2026-10-24 |
| FireHydrant | On-call & incidents | Free tier | Up to 10 responders; 2 runbooks; Slack & Teams chatbot | 2026-10-24 |
| GlitchTip | Error tracking | Free tier | Up to 1,000 events/mo; unlimited projects | 2026-10-24 |
| Grafana Cloud | Logs | Free tier | All Grafana Cloud services with usage limits; 10k active metric series; 14-day retention | 2026-10-24 |
| Graylog | Logs | Free tier | Free permanently; no daily ingest cap or volume limit (self-hosted) | 2026-10-24 |
| groundcover | APM & full-stack | Free tier | $0, "free forever", no credit card required | 2026-10-24 |
| Healthchecks.io | Uptime, cron & status pages | Free tier | 20 jobs; 100 log entries per job | 2026-10-24 |
| Helicone | LLM observability | Free tier | 10,000 free requests; 1 GB storage; 1 seat | 2026-10-24 |
| Honeybadger | Error tracking | Free tier | 1 user; 5,000 errors/mo; 50 MB/day performance & logging; unlimited projects | 2026-10-24 |
| Honeycomb | APM & full-stack | Free tier | Up to 20M events/mo and 100M metric data points/mo; 2 triggers | 2026-10-24 |
| Hyperping | Uptime, cron & status pages | Free tier | 20 monitors; 5-min checks; 1 seat | 2026-10-24 |
| ilert | On-call & incidents | Free tier | Up to 5 users; on-call management; 1 status page; 100 SMS/voice notifications | 2026-10-24 |
| incident.io | On-call & incidents | Free tier | Slack/Teams incident response; single-team on-call; status page | 2026-10-24 |
| Instatus | Uptime, cron & status pages | Free tier | 15 monitors; 2-min checks; 5 team members; public status page; 200 subscribers | 2026-10-24 |
| Laminar | LLM observability | Free tier | $0/month | 2026-10-24 |
| Langfuse | LLM observability | Free tier | 50k units/mo; all platform features with limits; no card | 2026-10-24 |
| LangSmith | LLM observability | Free tier | $0/seat; up to 5k base traces/mo; 1 seat | 2026-10-24 |
| Last9 | APM & full-stack | Unverified | Unknown — not yet reviewed | 2026-10-24 |
| Loggly | Logs | No free tier | 30-day full-featured free trial | 2026-10-24 |
| LogRocket | Product analytics & replay | No free tier | Free trial only | 2026-10-24 |
| Logz.io | Logs | No free tier | 14-day free trial only | 2026-10-24 |
| Lunary | LLM observability | No free tier | No new free workspaces: payment required to activate cloud workspace | 2026-10-24 |
| Mezmo | Logs | No free tier | No free tier stated on pricing page | 2026-10-24 |
| Middleware | APM & full-stack | Free tier | $0; all features with monthly limits; 100 GB data volume; 1,000 RUM sessions | 2026-10-24 |
| New Relic | APM & full-stack | Free tier | 100 GB data ingest/mo; 1 free full platform user; unlimited basic users; $0.40/GB beyond | 2026-10-24 |
| Observe | Logs | No free tier | Free trial | 2026-10-24 |
| Oh Dear | Uptime, cron & status pages | No free tier | 10-day free trial, no credit card needed | 2026-10-24 |
| OneUptime | Uptime, cron & status pages | Free tier | $0 plan; paid plans unlock features | 2026-10-24 |
| OpenObserve | Logs | No free tier | 14-day free trial (cloud); open-source self-host | 2026-10-24 |
| OpenStatus | Uptime, cron & status pages | Free tier | 1 monitor; 1 status page (3 components); 10-min min interval | 2026-10-24 |
| Opik (Comet) | LLM observability | Free tier | Cloud: 25k spans/month. Open source: $0 | 2026-10-24 |
| PagerDuty | On-call & incidents | Free tier | 5 users; 1 on-call schedule & escalation policy; limited notifications | 2026-10-24 |
| Papertrail | Logs | No free tier | Free trial only; from $5/GB/month | 2026-10-24 |
| Parseable | Logs | Unverified | Unknown — not yet reviewed | 2026-10-24 |
| Pingdom | Uptime, cron & status pages | No free tier | Free trial only (Synthetics + RUM) | 2026-10-24 |
| Portkey | LLM observability | Free tier | 10k recorded logs/month | 2026-10-24 |
| PostHog | Product analytics & replay | Free tier | 1M analytics events, 5K session recordings, 1M feature-flag requests/mo; 1 project; usage stops at limits | 2026-10-24 |
| Raygun | Error tracking | No free tier | 14-day free trial only; paid plans | 2026-10-24 |
| Rollbar | Error tracking | Free tier | 5K occurrences + 1K replays/mo; real-time feed & alerts | 2026-10-24 |
| Rootly | On-call & incidents | No free tier | No free tier listed; Incident Response $20/user/mo | 2026-10-24 |
| Scout APM | APM & full-stack | Free tier | $0/mo; 300K transactions/mo; 1 GB logs; 5,000 errors | 2026-10-24 |
| Sematext | Logs | No free tier | 14-day free trial | 2026-10-24 |
| Sentry | Error tracking | Free tier | 1 user; 5k errors/mo; email alerts; 10 custom dashboards | 2026-10-24 |
| SigNoz Cloud | APM & full-stack | No free tier | Cloud free trial; Teams plan $49/mo minimum usage (self-host OSS option) | 2026-10-24 |
| Site24x7 | Uptime, cron & status pages | Free tier | Uptime monitoring of up to 50 resources; email alerts | 2026-10-24 |
| Splunk Observability Cloud | APM & full-stack | Unverified | Unknown — not yet reviewed | 2026-10-24 |
| Squadcast | On-call & incidents | No free tier | 14-day fully functional trial | 2026-10-24 |
| StatusCake | Uptime, cron & status pages | Free tier | 10 uptime monitors; 5-min test intervals | 2026-10-24 |
| StatusGator | Uptime, cron & status pages | Free tier | Free forever: 100 status page subscribers; 1 month of data; 10 notifications/month (as captured from plan table) | 2026-10-24 |
| Sumo Logic | Logs | No free tier | Free trial; "$0 ingest" model, billed by scans | 2026-10-24 |
| TrackJS | Error tracking | No free tier | Free trial ("+ one month free") | 2026-10-24 |
| updown.io | Uptime, cron & status pages | No free tier | 100,000 free credits to try | 2026-10-24 |
| UptimeRobot | Uptime, cron & status pages | Free tier | 50 monitors; 5-min interval; basic status pages (non-commercial/hobby use) | 2026-10-24 |
| Uptrace | APM & full-stack | Free tier | Cloud: 50 GB and 5,000 timeseries free per month, then from $0.075/GB | 2026-10-24 |
| W&B Weave | LLM observability | Free tier | $0/mo; Weave ingestion 1 GB/mo | 2026-10-24 |
| Zenduty | On-call & incidents | No free tier | 14-day trial, no credit card required | 2026-10-24 |