# BillionVerify, $20 pack, Starter, POST /verify/bulk: Email verification API

> POST /verify/bulk — verify up to 50 addresses per API call, synchronously. All results come back in a single API response, on the same schema the real-time email verification API uses for one address.

BillionVerify's email verification API on its Starter plan. It costs $1.00 per 1,000 emails. It returns 4 of the 6 key fields we check: Address, Deliverability, Confidence, Company.
Half of the 1,712 plans we rank by price cost $2.632 per 1,000 or less. This plan costs less than 77% of the 1,712 plans.
The cheapest plan we rank by price is [treg, top-up from $10](https://datacircle.dev/validate-email-apis/treg/top-up-from-10/llms.txt), at $0.00 per 1,000.

- This page: https://datacircle.dev/validate-email-apis/billionverify/20-pack-starter-post-verify-bulk
- [Best email verification API in 2026](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://billionverify.com/pricing
- Its API docs: https://billionverify.com/docs/api-reference#batch-email-verification
- Sold by: BillionVerify (https://billionverify.com)
- Checked: 2026-10-20

## In the answer

- Completeness: 67%
- Address: ✓
- Deliverability: ✓
- Confidence: ✓
- Company: ✓

## Price

- $ per 1,000: $1.00
- Billing: pay first

## Aggregators

- Aggregators: none

## Charges

- Repeat free: 24 hours
- Per: result
- Also pays for: from the same budget: Single Email Verification · File Upload Verification · Email Finder · Bulk Email Finder · Company Search

## Not found

- $ per 1,000: $0.00

## Catch-all

- $ per 1,000: $1.00

## In their words

- Their pitch: POST /verify/bulk — verify up to 50 addresses per API call, synchronously. All results come back in a single API response, on the same schema the real-time email verification API uses for one address.

## Data

- Freshness: live
- Keep data: no limit
- Use data: You may not use the Service to: Violate anti-spam, privacy, consumer protection, or data protection laws. Submit data you do not have the lawful right to process. Abuse promotional offers, bypass rate limits, probe our systems, or attempt unauthorized access. Reverse engineer, copy, resell, sublicense, or build a competing service using the Service except as expressly permitted by us in writing. [...] Subject to these Terms, we grant you a limited, revocable, non-exclusive, non-transferable right to use the Service for your internal business purposes.

## Plan

- Pay: $20
- You get: 20,000 credits
- Enough for: 20,000 results
- Expires: never

## Rate limit

- Per second: 25
- Batch: 50

## Speed

- Answer: in the call

## The call

- You send: emails. Optional: check_smtp, force_refresh, include_domain_reputation
- Method: POST
- Path: /verify/bulk

## About the plan

- Plan: Starter
- Who can get it: anyone at least 18 years old and legally able to enter into a contract, for their internal business purposes only

## The 36 fields the plan's answer can hold

email, status, score, deliverable, disposable, catch-all, role address, free email, domain, domain age, MX records, MX IP, MX ASN, MX AS organization, domain reputation, SMTP checked, SMTP result, catch-all evidence, reason, did you mean, alias of, risk reasons, SMTP response, response time, credits used, verification mode, retryable, SMTPUTF8, retry after seconds, total emails, valid emails, invalid emails, process time, retryable emails, deferred emails, deliverability buckets

## BillionVerify's plans (18)

- [BillionVerify, $20 pack, Starter, POST /verify/bulk](https://datacircle.dev/validate-email-apis/billionverify/20-pack-starter-post-verify-bulk/llms.txt): $1.00 per 1,000, 67% complete, live
- [BillionVerify, $45 pack, Popular, POST /verify/bulk](https://datacircle.dev/validate-email-apis/billionverify/45-pack-popular-post-verify-bulk/llms.txt): $0.90 per 1,000, 67% complete, live
- [BillionVerify, $80 pack, Professional, POST /verify/bulk](https://datacircle.dev/validate-email-apis/billionverify/80-pack-professional-post-verify-bulk/llms.txt): $0.80 per 1,000, 67% complete, live
- [BillionVerify, $150 pack, Business, POST /verify/bulk](https://datacircle.dev/validate-email-apis/billionverify/150-pack-business-post-verify-bulk/llms.txt): $0.75 per 1,000, 67% complete, live
- [BillionVerify, $200 pack, Enterprise, POST /verify/bulk](https://datacircle.dev/validate-email-apis/billionverify/200-pack-enterprise-post-verify-bulk/llms.txt): $0.40 per 1,000, 67% complete, live
- [BillionVerify, $350 pack, Ultimate, POST /verify/bulk](https://datacircle.dev/validate-email-apis/billionverify/350-pack-ultimate-post-verify-bulk/llms.txt): $0.35 per 1,000, 67% complete, live
- [BillionVerify, $16 monthly, Starter, POST /verify/bulk](https://datacircle.dev/validate-email-apis/billionverify/16-monthly-starter-post-verify-bulk/llms.txt): $0.80 per 1,000, 67% complete, live
- [BillionVerify, $36 monthly, Popular, POST /verify/bulk](https://datacircle.dev/validate-email-apis/billionverify/36-monthly-popular-post-verify-bulk/llms.txt): $0.72 per 1,000, 67% complete, live
- [BillionVerify, $64 monthly, Professional, POST /verify/bulk](https://datacircle.dev/validate-email-apis/billionverify/64-monthly-professional-post-verify-bulk/llms.txt): $0.64 per 1,000, 67% complete, live
- [BillionVerify, $120 monthly, Business, POST /verify/bulk](https://datacircle.dev/validate-email-apis/billionverify/120-monthly-business-post-verify-bulk/llms.txt): $0.60 per 1,000, 67% complete, live
- [BillionVerify, $160 monthly, Enterprise, POST /verify/bulk](https://datacircle.dev/validate-email-apis/billionverify/160-monthly-enterprise-post-verify-bulk/llms.txt): $0.32 per 1,000, 67% complete, live
- [BillionVerify, $280 monthly, Ultimate, POST /verify/bulk](https://datacircle.dev/validate-email-apis/billionverify/280-monthly-ultimate-post-verify-bulk/llms.txt): $0.28 per 1,000, 67% complete, live
- [BillionVerify, $96 yearly, Starter, POST /verify/bulk](https://datacircle.dev/validate-email-apis/billionverify/96-yearly-starter-post-verify-bulk/llms.txt): $0.40 per 1,000, 67% complete, live
- [BillionVerify, $216 yearly, Popular, POST /verify/bulk](https://datacircle.dev/validate-email-apis/billionverify/216-yearly-popular-post-verify-bulk/llms.txt): $0.36 per 1,000, 67% complete, live
- [BillionVerify, $384 yearly, Professional, POST /verify/bulk](https://datacircle.dev/validate-email-apis/billionverify/384-yearly-professional-post-verify-bulk/llms.txt): $0.32 per 1,000, 67% complete, live
- [BillionVerify, $720 yearly, Business, POST /verify/bulk](https://datacircle.dev/validate-email-apis/billionverify/720-yearly-business-post-verify-bulk/llms.txt): $0.30 per 1,000, 67% complete, live
- [BillionVerify, $960 yearly, Enterprise, POST /verify/bulk](https://datacircle.dev/validate-email-apis/billionverify/960-yearly-enterprise-post-verify-bulk/llms.txt): $0.16 per 1,000, 67% complete, live
- [BillionVerify, $1,680 yearly, Ultimate, POST /verify/bulk](https://datacircle.dev/validate-email-apis/billionverify/1680-yearly-ultimate-post-verify-bulk/llms.txt): $0.14 per 1,000, 67% complete, live

## BillionVerify's calls (3)

- `POST /verify/bulk`: [BillionVerify, $20 pack, Starter, POST /verify/bulk](https://datacircle.dev/validate-email-apis/billionverify/20-pack-starter-post-verify-bulk/llms.txt)
- `POST /verify/file`: [BillionVerify, $20 pack, Starter, POST /verify/file](https://datacircle.dev/validate-email-apis/billionverify/20-pack-starter-post-verify-file/llms.txt)
- `POST /verify/single`: [BillionVerify, $20 pack, Starter, POST /verify/single](https://datacircle.dev/validate-email-apis/billionverify/20-pack-starter-post-verify-single/llms.txt)

## BillionVerify's APIs (1)

- [BillionVerify: email verification API pricing, 18 plans, POST /verify/bulk](https://datacircle.dev/validate-email-apis/billionverify/20-pack-starter-post-verify-bulk/llms.txt)

## BillionVerify: email verification API alternatives

- [Verimail, $100 pack](https://datacircle.dev/validate-email-apis/verimail/100-pack/llms.txt): $1.00 per 1,000, 50% complete, live
- [OneShot, pay as you go](https://datacircle.dev/validate-email-apis/oneshot/pay-as-you-go/llms.txt): $1.00 per 1,000, 33% complete, live
- [DeBounce, top-up from $200, 200K credits, GET /v1/, Single email validation](https://datacircle.dev/validate-email-apis/debounce/top-up-from-200-200k-credits-get-v1/llms.txt): $1.00 per 1,000, 50% complete, live
- [NeuralVerge, $50 monthly](https://datacircle.dev/validate-email-apis/neuralverge/50-monthly/llms.txt): $1.00 per 1,000, 50% complete, live

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-10-20.

- https://api.billionverify.com/openapi.yaml
- https://billionverify.com/docs/api-reference.md
- https://billionverify.com/email-verification-api.md
- https://billionverify.com/help.md
- https://billionverify.com/help/disposable-emails-are-free.md
- https://billionverify.com/help/do-credits-expire.md
- https://billionverify.com/help/no-charge-for-recheck-within-24h.md
- https://billionverify.com/help/what-does-catch-all-mean.md
- https://billionverify.com/help/which-results-are-charged.md
- https://billionverify.com/llms-full.txt
- https://billionverify.com/llms.txt
- https://billionverify.com/pricing
- https://billionverify.com/pricing.md
- https://billionverify.com/terms