# SyncGTM, free: Email verification API

> Give it an email address and find out whether it is safe to send to.

SyncGTM's email verification API on its Free plan. It costs $0.00 per 1,000 emails. It returns 2 of the 6 key fields we check: Address, Deliverability.
We rank 3,227 plans by price. [treg's top-up from $10](https://datacircle.dev/validate-email-apis/treg/top-up-from-10/llms.txt) is the cheapest paid plan per 1,000 emails: $0.00 on average. treg asks one provider after another until one answers. You pay $68.365 per 1,000 emails when no provider answers.
[Disify's $9 monthly plan (/email)](https://datacircle.dev/validate-email-apis/disify/9-monthly-starter-post-email/llms.txt) covers any number of emails. Disify's $9 monthly plan costs less up front than treg's top-up from $10.
[MailTester Ninja](https://datacircle.dev/validate-email-apis/mailtester-ninja/23-99-monthly/llms.txt), [Enrich.so](https://datacircle.dev/validate-email-apis/enrich-so/499-monthly/llms.txt) and [GetProspect](https://datacircle.dev/validate-email-apis/getprospect/369-pack/llms.txt) are the best email verification API providers in our benchmark.

- This page: https://datacircle.dev/validate-email-apis/syncgtm/free
- [Best email verification API in 2026: providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://syncgtm.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `POST https://api.syncgtm.com/v1/api/enrich/verify-email`
- API key: with the plan, on https://syncgtm.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Its API docs: https://docs.syncgtm.com/rest_api/endpoints/verify_email?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Sold by: SyncGTM (https://syncgtm.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-02

## In the answer

- Completeness: 33%
- Address: ✓
- Deliverability: ✓

## Price

- $ per 1,000 emails: $0.00
- Per: call
- Billing: free

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: Find Work Email · Find Personal Email · Find Mobile Number

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## Catch-all

- $ per 1,000: $0.00

## Bounce

- Bounce refund: never

## In their words

- Their pitch: Give it an email address and find out whether it is safe to send to.

## Data

- Keep data: no limit
- Use data: a non-exclusive, non-transferable, revocable right to use Enrichment Results internally for your own go-to-market activities. All other rights are reserved. You must not, without our prior written consent: resell, licence, publish, syndicate, broker, or otherwise make Enrichment Results available to any third party as a dataset, list, directory, feed or data product, contribute Enrichment Results to a data cooperative, data exchange, shared pool, or contact-sharing arrangement, use Enrichment Results to train, fine-tune, or generate embeddings for any model that you distribute, licence or make available to third parties, append Enrichment Results to a product or database that you sell, licence or provide to third parties, represent Enrichment Results as your own proprietary data, or as verified, endorsed or warranted by SyncGTM

## Plan

- Pay: $0
- You get: 50 credits a month
- Enough for: 250 calls a month
- Expires: at the start of each cycle, no rollover

## Rate limit

- Per second: 1
- Batch: 1

## Speed

- Answer: in the call
- Median: 4.62 s

## The call

- You send: Content-Type header "application/json", email. Optional: Idempotency-Key header
- Method: POST
- Path: /enrich/verify-email

## About the plan

- Plan: Free
- Who can get it: anyone aged 16 or over, for lawful business use, one free allowance per organisation

## The 2 fields the plan's answer can hold

status, email address

## SyncGTM's plans (17)

- [SyncGTM, free](https://datacircle.dev/validate-email-apis/syncgtm/free/llms.txt): $0.00 per 1,000, 33% complete
- [SyncGTM, $50 pack](https://datacircle.dev/validate-email-apis/syncgtm/50-pack/llms.txt): $10.00 per 1,000, 33% complete
- [SyncGTM, $95 pack](https://datacircle.dev/validate-email-apis/syncgtm/95-pack/llms.txt): $9.50 per 1,000, 33% complete
- [SyncGTM, $135 pack](https://datacircle.dev/validate-email-apis/syncgtm/135-pack/llms.txt): $9.00 per 1,000, 33% complete
- [SyncGTM, $212.50 pack](https://datacircle.dev/validate-email-apis/syncgtm/212-50-pack/llms.txt): $8.50 per 1,000, 33% complete
- [SyncGTM, $400 pack](https://datacircle.dev/validate-email-apis/syncgtm/400-pack/llms.txt): $8.00 per 1,000, 33% complete
- [SyncGTM, $750 pack](https://datacircle.dev/validate-email-apis/syncgtm/750-pack/llms.txt): $7.50 per 1,000, 33% complete
- [SyncGTM, $1,400 pack](https://datacircle.dev/validate-email-apis/syncgtm/1400-pack/llms.txt): $7.00 per 1,000, 33% complete
- [SyncGTM, $49 monthly](https://datacircle.dev/validate-email-apis/syncgtm/49-monthly/llms.txt): $9.80 per 1,000, 33% complete
- [SyncGTM, $99 monthly](https://datacircle.dev/validate-email-apis/syncgtm/99-monthly/llms.txt): $6.60 per 1,000, 33% complete
- [SyncGTM, $249 monthly](https://datacircle.dev/validate-email-apis/syncgtm/249-monthly/llms.txt): $4.98 per 1,000, 33% complete
- [SyncGTM, $649 monthly](https://datacircle.dev/validate-email-apis/syncgtm/649-monthly/llms.txt): $3.245 per 1,000, 33% complete
- [SyncGTM, $529 yearly](https://datacircle.dev/validate-email-apis/syncgtm/529-yearly/llms.txt): $8.817 per 1,000, 33% complete
- [SyncGTM, $1,069 yearly](https://datacircle.dev/validate-email-apis/syncgtm/1069-yearly/llms.txt): $5.939 per 1,000, 33% complete
- [SyncGTM, $2,689 yearly](https://datacircle.dev/validate-email-apis/syncgtm/2689-yearly/llms.txt): $4.482 per 1,000, 33% complete
- [SyncGTM, $7,009 yearly](https://datacircle.dev/validate-email-apis/syncgtm/7009-yearly/llms.txt): $2.92 per 1,000, 33% complete
- [SyncGTM, contact us](https://datacircle.dev/validate-email-apis/syncgtm/contact-us/llms.txt): 33% complete

## SyncGTM's calls for this API (1)

- `POST /enrich/verify-email`: [SyncGTM, free](https://datacircle.dev/validate-email-apis/syncgtm/free/llms.txt)

## SyncGTM's APIs (3)

- [SyncGTM: email verification API pricing, 17 plans](https://datacircle.dev/validate-email-apis/syncgtm/free/llms.txt)
- [SyncGTM: email finder API pricing, 17 plans](https://datacircle.dev/find-email-apis/syncgtm/free/llms.txt)
- [SyncGTM: phone finder API pricing, 17 plans](https://datacircle.dev/find-phone-apis/syncgtm/free/llms.txt)

## SyncGTM: email verification API alternatives

- [Abstract API, $1,749 yearly](https://datacircle.dev/validate-email-apis/abstract-api/1749-yearly/llms.txt): $2.915 per 1,000, 67% complete, live
- [Bounceless, $19 monthly, Starter: 6,500 credits per month, POST /v1/requests, Create a batch (emails)](https://datacircle.dev/validate-email-apis/bounceless/19-monthly-starter-6500-credits-per-month-post-v1-requests-6500-credits-a-month/llms.txt): $2.923 per 1,000, 50% complete, live
- [SendPulse, $1,756.80 yearly, Subscription 50000, Yearly, POST /verifier-service/send-single-to-verify/](https://datacircle.dev/validate-email-apis/sendpulse/1756-80-yearly-subscription-50000-yearly-post-verifier-service-send-single-to-verify/llms.txt): $2.928 per 1,000, 33% complete, stored
- [1Lookup, $2,990 yearly, Growth (annual), POST /bulk/jobs](https://datacircle.dev/validate-email-apis/1lookup/2990-yearly-growth-annual-post-bulk-jobs/llms.txt): $2.931 per 1,000, 67% 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 2026-11-02.

- https://docs.syncgtm.com/rest_api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.syncgtm.com/rest_api/endpoints?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.syncgtm.com/rest_api/endpoints/verify_email?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.syncgtm.com/rest_api/errors?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.syncgtm.com/rest_api/rate_limits?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://syncgtm.com/credits-estimator?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://syncgtm.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://syncgtm.com/product/waterfall-enrichment-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://syncgtm.com/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing