Dimension Fliq cron-job.org
Scheduling model Cron + one-off, any HTTP request Cron-style URL pings
Automatic retries Configurable backoff, per-job Basic re-try, limited
Crash recovery Reaper reschedules crashed jobs None
Execution history Full per-attempt history Recent runs only
Calls any HTTP endpoint Yes — any URL, method, headers, body Yes (GET/POST URL)
AI agents (MCP) MCP server (beta) No
Self-host Yes (open source) No
Open source Yes No
Pricing model Free in beta, then $1/100k Free
Best for Production HTTP jobs that must not be dropped Hobby pings & keep-alives

When Fliq fits

The call matters: a failed webhook should retry with backoff, a worker crash shouldn't silently drop the job, and you need to see exactly what happened on every attempt. Fliq adds retries, a crash reaper, and queryable history — plus an MCP server (in beta) so AI agents can schedule jobs.

When cron-job.org fits

You want a free, no-account-needed way to hit a URL every few minutes — uptime pings, cache warmers, hobby keep-alives. cron-job.org has done this reliably for years and costs nothing.