Email Verification API Pricing: What It Actually Costs
Most email verification APIs offer a free tier of 50–250 checks per month, then move to either a purchased-credit model (pay once, credits often expire or roll over) or a monthly quota subscription starting around $9–40/month for low-thousands of checks. Per-check cost drops sharply at volume, often to fractions of a cent. Email Risk Radar uses monthly quota plans starting free (250 checks/month) and £9/month (5,000 checks), plus a one-time £49 bulk pass for a single list-cleaning job without a subscription.
Two different pricing models in this category
Providers in this space price one of two ways, and it's worth knowing which you're comparing before looking at a headline number. Credit-based pricing (ZeroBounce, Bouncer, Emailable, Abstract API, Clearout, MillionVerifier) sells a pool of credits — sometimes expiring, sometimes not — consumed one per check regardless of when you use them. Quota-based pricing (Email Risk Radar) sells a fixed number of checks per billing period as part of a monthly plan, with optional overage. Credits suit unpredictable, bursty usage; a monthly quota suits steady, ongoing traffic like screening every signup as it happens.
Free tiers across the category
| Provider | Free tier | Card required? |
|---|---|---|
| Email Risk Radar | 250 checks/month, ongoing | No |
| ZeroBounce | 100 credits/month, ongoing | No |
| Bouncer | 100 credits (one-time) | No |
| Hunter | 50 credits/month, ongoing | No |
| Emailable | 250 credits (one-time trial) | No |
| Abstract API | 100 requests/month, ongoing | No |
| Clearout | 100 credits (one-time, never expire) | No |
| MillionVerifier | 100 credits (one-time) | No |
NeverBounce and Kickbox's current free-tier terms aren't confirmed directly for the fuller comparison this table is drawn from — see Best Email Verification APIs in 2026 for the full sourcing notes. The pattern that holds across every confirmed provider: nobody in this category requires a card to try it, and "free" splits fairly evenly between an ongoing monthly allowance and a one-time trial balance.
Entry-level paid pricing
| Provider | Entry price | What it buys |
|---|---|---|
| Email Risk Radar | £9/month | 5,000 checks/month (Starter) |
| Abstract API | $17/month (annual) | 5,000 requests/month |
| Kickbox | ~$5 / 500 verifications | third-party sourced, pay-as-you-go |
| Bouncer | $8 / 1,000 credits | pay-as-you-go, credits never expire |
| NeverBounce | ~$10/month | ~1,000 verifications/month, third-party sourced |
| Clearout | ~$23/month | ~3,000 credits, third-party sourced |
| Emailable | $32.30/month | 5,000 credits (subscription, 15% off pay-as-you-go) |
| Hunter | £28/month | 2,000 credits/month (verification bundled with discovery) |
| ZeroBounce | From $99/month | 10,000 credits minimum |
Email Risk Radar's actual plans
| Plan | Price | Checks/month | Bulk endpoint |
|---|---|---|---|
| Free | £0 | 250 | No |
| Starter | £9/month | 5,000 | No |
| Growth | £29/month | 25,000 | Yes |
| Pro | £79/month | 100,000 | Yes, priority processing |
| Business | £249/month | 500,000 | Yes, priority processing |
Every plan above Free supports metered overage rather than a hard cutoff, so a traffic spike doesn't mean checks silently stop working mid-month. For a one-off job — cleaning a purchased list once, a single CRM import — without committing to a recurring plan, a one-time bulk pass (£49, 10,000 checks, valid 30 days) works on top of any plan including Free, rather than requiring an upgrade to a bulk-enabled tier.
What actually drives cost, beyond the headline number
- Whether unknown/inconclusive results consume a credit — Emailable's do not, which is a genuine cost advantage on messy lists specifically; most competitors, including Email Risk Radar, charge per attempted check regardless of result
- Whether credits expire — expiring credits push you toward using (or losing) a purchased balance; a monthly quota resets automatically but doesn't roll over unused checks
- Whether SMTP/"full" mode verification costs extra or counts as a normal check — this varies enough by provider that it's worth confirming directly rather than assuming
- Overage handling — whether exceeding a plan's included volume is metered smoothly or simply blocks further checks until the next cycle
FAQ
Both exist in this category. ZeroBounce, Hunter, Abstract API, and Email Risk Radar all offer an ongoing monthly free allowance rather than a one-time trial balance — so "free" keeps working indefinitely at low volume, not just for a first batch of checks.
Partly real feature differences (deliverability monitoring, breach checking, and lead discovery all add cost elsewhere in the category), and partly business model — credit-based pricing and quota-based pricing aren't directly comparable on a single number without accounting for expiry, overage, and whether inconclusive results are charged.
For a one-off job, yes, typically — a £49 one-time pass for 10,000 checks avoids committing to a recurring monthly plan you'd otherwise have to remember to cancel after using it once.
For Email Risk Radar, full mode (which includes a live SMTP handshake) is available on the same plans as standard checks, at the same per-check cost — it's a mode you choose per request, not a separately priced tier. Confirm this directly with other providers, since it varies across the category.