Loader.io (SendGrid)
Loader.io (SendGrid) — Free cloud-based load testing service for testing web app endpoints with configurable concurrent users.
Our Verdict
A fine free warm-up tool, but not a replacement for proper scriptable load testing.
Pros
- Dead simple UI, minutes to first load test
- Generous free tier for small endpoints
- No-install cloud runner
- Handy for quick stakeholder demos
Cons
- Limited scripting and scenario complexity
- Small set of metrics versus k6 or Gatling
- Host verification required, friction for some setups
- Future clouded since SendGrid acquisition
Best for: Small teams quickly validating a single endpoint under modest traffic
Not for: Serious performance engineering needing scripting and deep metrics
When to Use Loader.io (SendGrid)
Good fit if you need
- Free load testing for REST endpoints with ramp-up config
- Concurrent user simulation up to 100K clients
- Quick API stress test before product launch
- Cloud-based load generation without infra setup
Lock-in Assessment
Low 4/5
Lock-in Score 4/5
Pricing
Price wrong?Loader.io (SendGrid) Pricing
- Pricing Model
- freemium
- Free Tier
- Yes
- Entry Price
- —
- Enterprise Available
- No
- Transparency Score
- —
Beta — estimates may differ from actual pricing
1,000
1001K10K100K1M
Estimated Monthly Cost
$25
Estimated Annual Cost
$300
Estimates are approximate and may not reflect current pricing. Always check the official pricing page.
Community Discussion
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