isitdisposable vs Fidro
Fidro sells a focused real-time email API and headlines low-latency responses. Like us, it targets developers who want a signal at signup rather than bulk list cleaning.
| Dimension | Is It Disposable | Fidro |
|---|---|---|
| Primary purpose | Real-time disposable and deliverability detection at signup | Real-time email intelligence API |
| Detection method | DNS-level (MX, A, AAAA). No SMTP mailbox probing, ever | DNS-level, real-time (no SMTP probing) |
| Over-quota behavior | Fails open with a safe allow (HTTP 200), so your form never breaks | Per-plan credits; behavior on exhaustion varies |
| Enforcement model | Per-account policy maps every signal to allow, warn, or block | Returns signals; enforcement is left to you |
| Signals returned | Disposable, deliverability, relay, public provider, role, typo, spam risk | Disposable, relay, MX, public provider, role, typo, normalized email |
| Integration | Drop-in JavaScript snippet, REST API, and a batch endpoint | REST API with plugins and no-code integrations |
| Logging and privacy | Domain-only logging by default; stricter no-storage mode available | Varies; some offer EU hosting and a DPA |
When Fidro might be the better fit
If a single published latency number is your primary criterion, compare Fidro's SLA against ours directly.
Where signup protection differs
Whatever you pick, three things matter at the signup form specifically, and they are the three we put in writing:
Fails open, guaranteed
Over quota or during an outage you get a safe allow, clearly marked unchecked. A signup is never lost to a detection dependency.
Your policy, not a score
Every signal maps to allow, warn, or block in your own policy. We return the action; your form enforces it.
Domain-only logging
Request logs never store the part before the @. The opt-in no-storage mode keeps only the verdict and billing metadata.
Try the real engine for free
The demo runs the live detection engine - no account needed. Sign up for a 14-day full-access trial to see the full product, then stay on the Free plan or upgrade.
Comparison based on public information and our June 2026 research; competitor features and pricing change, so verify current details on their site. See other comparisons.