Plunk
72Open-source email platform
transactional
Operational
Founded 2023Plunk is an open-source email platform that can be self-hosted or used as a managed service. It appeals to developers who want full control over their email infrastructure while still benefiting from modern features like React components and automation.
Speed
73Reliability
70Deliverability
71Developer Experience
78Value
68Current Metrics
| Delivery Speed (p50) | 280ms |
| Delivery Speed (p95) | 640ms |
| Delivery Speed (p99) | 960ms |
| Delivery Speed (avg) | 350ms |
| API Latency (p50) | 70ms |
| API Latency (p95) | 200ms |
| API Latency (p99) | 340ms |
| API Latency (avg) | 90ms |
| Uptime (30d) | 99.82% |
| Deliverability | 93.8% |
| Bounce Rate | 3.8% |
| Throughput | 5,000/s |
12-Month Trend
Overall Score
Delivery Speed (avg ms)
Uptime %
Deliverability %
Features
✓Open source
✓Self-hostable
✓React components
✓Automations
✓Contacts API
✓Event tracking
Pricing starts at Free (self-hosted)
Incidents (2)
Dashboard Analytics DelayedMinor
Plunk·Feb 18, 2026·45m·Resolved
Real-time analytics in the dashboard were showing delayed data. Email sending and delivery were unaffected. Analytics backfill completed automatically.
Contact Import Rate LimitedMinor
Plunk·Jun 20, 2025·15m·Resolved
Bulk contact imports were being rate limited more aggressively than expected. Individual contact creation via API was unaffected.
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