Developer services
Monitoring, error tracking, analytics, scheduled jobs, queues, realtime and authentication services.
Key
- ★ qualifies
- usable as stated; the read path was probed
- caveat
- usable, with a named limit or an unprobed read path
- trial
- a time-boxed or one-time trial, not a recurring allowance
- paid
- no free allowance; listed for its price
- fails: identity
- the identity required is not reachable without it
- fails: egress
- data cannot be read back out at a usable rate or price
- fails: quota
- the free allowance is too small to matter
- dead
- the offer or the service no longer exists
- self-hosted, last resort
- software or a node that the user installs, runs and maintains. Self-hosted options are listed last, because this site is for users who have no hardware.
- free tier, no free tier
- the record states a free allowance, or states that it has none
- identity email
- what a signup asks for. A question mark after it: a placeholder, not read from a source
- no card, card, card?
- a payment card is not asked, is asked, or the record does not say
- limit
- the limit that runs out first, for example request-rate or volume-quota
- evidence
- how the record is backed, strongest first: measured, documented, reported, inferred, unverified
- fresh until, stale since
- the check is inside its window, or past it, on today's date
- inherited, checked live
- inherited: the record was carried from an earlier source, and its check date is an upper bound. Checked live: the record was checked against the service. The chip filters on it
- verdict
- a judgement of the whole offer for the need of its topic. The data holds no number as a cut-off. Read the free allowance and the limits of the record, and decide for your own need
- duplicate, disagrees
- another record holds the same offer, or a sibling record states another value
Usable 51
- ★ qualifiescron-job.org
Entirely free of charge, with no limit on the number of cronjobs per account (fair usage expected); each job runs up to 60 times an hour, i.e. every minute
free tieridentity emailno cardlimit request-rateevidence documentedstale on 2026-12-01
- caveatAbly
Free package: 6,000,000 messages a month, 500 messages a second, 200 concurrent connections and 200 concurrent channels, no credit card and no time limit
free tieridentity emailno cardlimit request-rateevidence documentedstale on 2026-12-03
- caveatAmplitude
Free plan, forever and with no credit card required: 2M events per month, unlimited team members, 10,000 monthly session replays kept 1 month, 5,000 monthly...
free tieridentity emailno cardlimit volume-quotaevidence documentedstale on 2026-12-02
- caveatAptabase
Free plan: 20,000 events per month with no credit card required; unlimited apps, EU or US data residency, built-in and live dashboards, session timeline and...
free tieridentity emailno cardlimit volume-quotaevidence documentedstale on 2026-12-02
- caveatAuth0
Free plan: up to 25,000 monthly active users, unlimited social connections, 5 organizations, 1 enterprise connection, 1,000 machine-to-machine...
free tieridentity emailno cardlimit request-rateevidence documentedstale on 2026-12-03
- caveatAxiom
Personal, USD 0/month, permanent, no credit card: 500 GB/mo data loading compute, 10 GB-hours query compute, 25 GB storage, 30-day retention, full APL...
free tieridentity emailno cardlimit volume-quotaevidence documentedstale on 2026-12-03
- caveatBetter Stack
Free for personal projects (USD 0/month): 10 monitors and 10 heartbeats with 3-minute checks, 1 status page, Slack and e-mail alerts, 100,000 exceptions per...
free tieridentity emailno cardlimit retention-clampedevidence documentedstale on 2026-12-03
- caveatBugfender
Free plan: 100K logs daily, 2,000 customer devices, unlimited user accounts and apps, 24 hours of retention, remote logging and native SDKs for mobile and...
free tieridentity emailno cardlimit retention-clampedevidence documentedstale on 2026-12-02
- caveatCheckly
Hobby plan at USD 0 a month, free forever with no credit card required: 10 uptime monitors, 1,000 browser check runs and 10,000 API check runs, 1 user, 6...
free tieridentity emailno cardlimit volume-quotaevidence documentedstale on 2026-12-02
- caveatClerk
Hobby: free with no credit card; 50,000 monthly retained users per app, unlimited applications, up to 3 dashboard seats
free tieridentity emailno cardlimit write-gatedevidence documentedstale on 2026-12-03
- caveatCloudAMQP (Little Lemur)
Little Lemur: 1 M messages a month, 20 connections, max 100 queues and max 10 000 queued messages on a shared RabbitMQ broker, free for as long as the...
free tieridentity emailno cardlimit request-rateevidence documentedstale on 2026-12-03
- caveatCloudAMQP (Loyal Lemming)
Loyal Lemming: 2 M messages a month, 40 connections, max 200 queues and max 20 000 queued messages on a shared LavinMQ broker, free for as long as the...
free tieridentity emailno cardlimit request-rateevidence documentedstale on 2026-12-03
- caveatCronitor
Hacker plan, free forever at USD 0: 5 monitors (jobs, checks and heartbeats) with a fastest check frequency of 5 minutes, 100,000 web analytics and error...
free tieridentity email?card?limit volume-quotaevidence documentedstale on 2026-12-02
- caveatDatadog (free)
Free tier after the 14-day trial: up to five Basic hosts with 1-day metric retention at no cost; LLM Observability separately has a free tier of up to 40K...
free tieridentity emailno cardlimit retention-clampedevidence documentedstale on 2026-12-01disagrees
- caveatDrumbeats
Free plan, $0 forever with no credit card: 200K beats a month, 50 monitors, 3 projects, a 1-minute minimum interval, a ping retention of 250, a maximum...
free tieridentity emailno cardlimit volume-quotaevidence documentedstale on 2026-12-02
- caveatEasyCron
Free plan, expires monthly: 200 EPDs (executions per day), 20-minute minimum interval, 5-second timeout, 10 logs & predictions
free tieridentity emailno cardlimit request-rateevidence documentedstale on 2026-12-03
- caveatFlagsmith
Free: up to 50,000 requests a month, 1 team member, 1 project, unlimited feature flags, environments, identities and segments, up to 100,000 users in...
free tieridentity emailno cardlimit volume-quotaevidence documentedstale on 2026-12-03
- caveatGoatCounter
Free for reasonable public usage: a personal website or a small-to-medium business is fine, while sending millions of pageviews a day is not; no numeric cap...
free tieridentity emailno cardlimit volume-quotaevidence documentedstale on 2026-12-02
- caveatGrafana Cloud (free)
Free plan at USD 0 with no credit card: all Grafana Cloud services with usage limits, including 10k active metric series, 50 GB of logs, 50 GB of traces and...
free tieridentity emailno cardlimit volume-quotaevidence documentedstale on 2026-12-01
- caveatGrowthBook
Starter: free with no credit card; up to 3 users and 1 project, unlimited feature flags, experiments and traffic; 1M CDN requests and 5 GB CDN bandwidth a...
free tieridentity emailno cardlimit volume-quotaevidence documentedstale on 2026-12-03
- caveatHealthchecks.io
Hobbyist plan at USD 0 a month: 20 monitored jobs (checks) per account and 100 log entries per job; the Supporter plan at USD 5 a month has the same limits
free tieridentity emailno cardlimit volume-quotaevidence documentedstale on 2026-12-02
- caveatHeap
Free plan: up to 10k monthly sessions with core analytics charts, unlimited enrichment sources, guides integrations, 6 months of data history and SSO; no...
free tieridentity emailno cardphonelimit volume-quotaevidence documentedstale on 2026-12-02
- caveatHoneycomb
Free, 'free forever': up to 20M events per month and up to 100M metrics data points per month, 2 triggers, distributed tracing, BubbleUp, OpenTelemetry...
free tieridentity emailno cardlimit volume-quotaevidence documentedstale on 2026-12-03
- caveatHotjar
Free plan at $0 forever: up to 200k monthly sessions, 1 project, 1 month of data access, replays, heatmaps and funnels, error and performance monitoring and...
free tieridentity emailno cardlimit volume-quotaevidence documentedstale on 2026-12-02
- caveatInngest
Free: 50,000 executions and 500,000 events ingested per month, 5 concurrent steps, no credit card required
free tieridentity emailno cardlimit volume-quotaevidence documentedstale on 2026-12-01
- caveatInstatus
Starter plan, free: 15 monitors at a 2-minute check interval, email alerts, 5 team members, 2 on-call members and a public status page with 200 subscribers...
free tieridentity emailcard?limit volume-quotaevidence documentedstale on 2026-12-02
- caveatLaunchDarkly
Developer: USD 0 a month forever, no credit card; unlimited feature flags and seats, 5 service connections and 1K client-side MAU a month, 100K...
free tieridentity emailno cardlimit volume-quotaevidence documentedstale on 2026-12-03
- caveatMiddleware
Free Forever plan, monthly allowances: 100 GB of data ingestion, 1,000 RUM sessions, 20,000 synthetic checks, 10 browser tests and 2 million OpsAI tokens; a...
free tieridentity cardlimit volume-quotaevidence documentedstale on 2026-12-02
- caveatMixpanel
Free plan, free forever with no credit card required: up to 1M events per month, unlimited seats, 10K session replays per month, up to 1k monthly experiment...
free tieridentity emailno cardlimit volume-quotaevidence documentedstale on 2026-12-02
- caveatNew Relic
Perpetual free tier: 100 GB/month of data ingest, one free full platform user, unlimited basic users, default data retention of at least 8 days, 500...
free tieridentity emailno cardlimit volume-quotaevidence documentedstale on 2026-12-03
- caveatOnlineOrNot
Hobby plan, free: 3 uptime monitors at a 3-minute check interval, 1,000 browser check runs a month, up to 2 users, 1 limited status page with 100 email...
free tieridentity email?card?limit volume-quotaevidence documentedstale on 2026-12-02
- caveatPhare
Hobby plan, free and with no credit card: 100,000 monitoring events a month with no additional usage, unlimited projects, organization users and public...
free tieridentity emailno cardlimit volume-quotaevidence documentedstale on 2026-12-02
- caveatPipedream
Free, no credit card required: every feature in development, with a daily credit limit and at most 10 external users
free tieridentity emailno cardlimit request-rateevidence documentedstale on 2026-12-03
- caveatPostHog
Free every month, reset monthly, with or without a card on file: 1M analytics events, 5K session recordings, 1M feature flag requests, 100K exceptions, 1500...
free tieridentity emailno cardlimit volume-quotaevidence documentedstale on 2026-12-03
- caveatPubNub
Free: 200 monthly active users or 1 million transactions a month, whichever is reached first, with 1GB data storage kept 7 days, no credit card
free tieridentity emailno cardlimit request-rateevidence documentedstale on 2026-12-03
- caveatPulsetic
Free plan: 10 monitors, heartbeats and domains in total at a 5-minute check interval from 3 regions, 3 months of uptime logs, 3 status pages, 1,000 real...
free tieridentity emailcard?limit volume-quotaevidence documentedstale on 2026-12-03
- caveatPusher
Channels Sandbox: 200k messages per day and 100 concurrent connections, free
free tieridentity emailno cardlimit request-rateevidence documentedstale on 2026-12-03
- caveatPusher Beams
Beams Sandbox plan, priced Free: 1,000 subscribers (registered devices) and Standard support
free tieridentity emailno cardlimit volume-quotaevidence documentedstale on 2026-12-02
- caveatSentry (developer)
Developer plan, free and limited to one user: 5k errors, 5GB logs, 5GB application metrics, 5M spans, 50 replays, 1 uptime monitor, 1 cron monitor and 1GB...
free tieridentity emailno cardlimit request-rateevidence documentedstale on 2026-12-01disagrees
- caveatSentry (Open-Source Sponsorship Plan)
Open-Source Sponsorship Plan, granted on application: 5M errors, 5,000GB logs, 5,000GB application metrics, 1B spans, 100K replays, 500 cron monitors, 25...
free tieridentity emailno cardlimit write-gatedevidence documentedstale on 2026-12-02disagrees
- caveatStatsig
Developer tier, free: 2 million metered events every calendar month at no charge, with free access to feature gates, dynamic configs, experimentation and...
free tieridentity emailcardlimit volume-quotaevidence documentedstale on 2026-12-02
- caveatStatusCake
Free plan at $0 per month: 10 uptime monitors at a 5-minute test interval, 1 page speed monitor, 1 domain monitor, 1 SSL monitor and alerts through...
free tieridentity email?card?limit request-rateevidence documentedstale on 2026-12-02
- caveatStytch
Always free: 10,000 monthly active users and AI agents, unlimited organizations, 5 SSO or SCIM connections and 1,000 M2M tokens; usage beyond is billed pay...
free tieridentity cardlimit write-gatedevidence documentedstale on 2026-12-03
- caveatTrigger.dev (free)
Free plan at USD 0 a month with no credit card: USD 5 of compute credits every month, 20 concurrent runs, unlimited tasks, 5 team members, 10 schedules, 1...
free tieridentity emailno cardlimit volume-quotaevidence documentedstale on 2026-12-01
- caveatUmami
Hobby plan at $0 a month: up to 100K events per month, 1 website, 6 months of data retention and community support; API access starts on the Pro plan
free tieridentity email?card?limit volume-quotaevidence documentedstale on 2026-12-02
- caveatUptimeObserver
Free plan: 20 monitors at a 5-minute interval, 1 status page with a custom domain, HTTPS, SSL, domain name, DNS and port monitoring, email alerts to 1...
free tieridentity emailno cardlimit request-rateevidence documentedstale on 2026-12-02
- caveatUptimeRobot
Free, USD 0/month: 50 monitors at a 5-minute monitoring interval, HTTP, port and ping monitors, basic status pages, only 5 integrations and no login seats...
free tieridentity emailno cardlimit request-rateevidence documentedstale on 2026-12-03
- caveatVal Town (free)
Free plan at USD 0: 100,000 runs / day, 15 min cron intervals, 1 min wall clock time / run, unlimited public vals, 3 days log retention, email to the...
free tieridentity emailno cardlimit request-rateevidence documentedstale on 2026-12-01
- caveatWindmill Cloud (Community)
Community plan on Windmill Cloud with no credit card: 1,000 free executions per user per month and 1,000 free executions per workspace per month; one...
free tieridentity emailno cardlimit request-rateevidence documentedstale on 2026-12-01
- caveatWorkOS
AuthKit user management free for the first 1 million monthly active users; staging environments are free; the production environment needs a payment method...
free tieridentity cardlimit write-gatedevidence documentedstale on 2026-12-03
- caveatZapier
Free: 100 tasks/mo; unlimited Zap workflows, Tables and Forms; two-step Zap workflows; 15 min polling
free tieridentity emailno cardlimit volume-quotaevidence documentedstale on 2026-12-03
Trial 4
- trialn8n
No free plan on n8n Cloud: a 14-day trial with Pro features and a limit of 1000 executions, no credit card required; Starter is 20€/mo billed annually for...
no free tieridentity emailno cardlimit retention-clampedevidence documentedstale on 2026-12-03
- trialOpenObserve
No recurring free tier on OpenObserve Cloud: a 14-day free trial of the Pay As You Go plan with no credit card required to start; afterwards USD 0.50 per GB...
identity emailno cardlimit retention-clampedevidence documentedstale on 2026-12-02
- trialPlausible Analytics
No free plan on Plausible Cloud: every account starts with a free 30-day trial with Business plan features and limits and no credit card; the cheapest plan...
no free tieridentity emailno cardlimit retention-clampedevidence documentedstale on 2026-12-03
- trialTemporal
$150 in free credits for every new Temporal Cloud account, expiring after 90 days; a credit card is required to sign up
free tieridentity cardlimit volume-quotaevidence documentedstale on 2026-12-03
Self-hosted, the last resort 4
Software or a node that the user installs, runs and maintains. Self-hosted options are listed last, because this site is for users who have no hardware.
- self-hosted, last resortcron-job.org chronos daemon (self-hosted)
Open-source scheduler software published on GitHub under the GNU General Public License version 2: chronos, cron-job.org's cron job execution daemon, with...
verdict qualifies-with-caveatidentity anonymousno cardlimit request-rateevidence documentedstale on 2026-12-02
- self-hosted, last resortInngest server (self-hosted)
The Inngest server is published on GitHub: installing the Inngest CLI, a single binary that includes all Inngest services, and running inngest start gives a...
verdict qualifies-with-caveatidentity anonymousno cardevidence documentedstale on 2026-12-02
- self-hosted, last resortn8n Community Edition (self-hosted)
The free Community edition: what n8n runs without a license key, with almost the complete feature set of n8n, installed and run by the user on a machine of...
verdict qualifies-with-caveatidentity anonymousno cardevidence documentedstale on 2026-12-02
- self-hosted, last resortTemporal server (self-hosted)
Open-source software that the user installs and runs: the full Temporal platform on the user's own infrastructure at no cost from Temporal, started locally...
verdict qualifies-with-caveatidentity anonymouspayment cardevidence documentedstale on 2026-12-02