A one-time-credit mailboxlayer alternative.
Choose emailverifier.dev for non-expiring credits and a compact POST API. Choose mailboxlayer when a monthly APILayer subscription, numeric quality scores, typo suggestions, or its higher-tier bulk endpoint fits your stack.
Reviewed August 4, 2026
Stored credits versus monthly quota and overages
mailboxlayer’s published Basic plan is $14.99 per month for 5,000 requests, and additional calls can incur overage charges after the monthly allowance is used. Higher tiers raise the quota and add larger bulk requests. emailverifier.dev sells a non-expiring balance with no recurring allowance, making it simpler for low or uneven traffic but less suitable if you specifically want automatic overage continuity.
| Compare | emailverifier.dev | mailboxlayer |
|---|---|---|
| Price | $10 for 20,000 checks. Credits do not expire. | Basic is $14.99 per month for 5,000 requests; Professional Plus is $74.99 for 50,000 requests. |
| Billing | Every authenticated email or domain check uses one project credit, including unknown results. | Monthly request quotas with plan-specific overage charges after the included volume is exhausted. |
| Product | Focused REST API, MCP server, domain reports, and project-scoped keys and balances. | Real-time validation with typo suggestions, quality score, provider flags, and catch-all detection; higher tiers add bulk requests. |
| API | POST one email and receive deliverable, risky, undeliverable, or unknown plus flagged. | A GET endpoint accepts the access key and email in query parameters and returns individual booleans plus a numeric score. |
Choose emailverifier.dev when
- Your usage changes month to month and unused credits should remain available.
- You want a POST API with credentials kept out of URLs.
- A compact application-facing decision is more useful than a quality score.
- You want project-scoped API keys, credits, and usage.
Choose mailboxlayer when
- Automatic overage billing is important to keep requests flowing after quota exhaustion.
- Your policy already depends on mailboxlayer’s numeric score or typo suggestion.
- You need its higher-tier bulk endpoint for small request batches.
- You already use APILayer products and prefer one vendor account.
Migration checklist
- 1Replace the mailboxlayer GET call with POST /api/v1/verify and a JSON email body.
- 2Move access_key from the query string to X-API-Key or Authorization.
- 3Replace score thresholds with deliverable, risky, undeliverable, or unknown.
- 4Use flagged for the simplest review branch and status when your policy needs more control.
- 5Remove or replace dependencies on typo suggestions and individual provider fields.
Test your real integration.
Start with 1,000 credits. Keep mailboxlayer running until your status mapping and fallback policy behave as expected.
Comparison uses public vendor information. Pricing and product terms can change.
mailboxlayer and its product names belong to their respective owner. emailverifier.dev is not affiliated with or endorsed by mailboxlayer.