Proofy email verification, $3K a month, self-reported: 5,000 credits

Proofy checks individual email addresses, uploaded contact lists, and verification inside automated product workflows. Its $3K a month was founder-reported on the Indie Hackers product page (not independently verified), as of September 30, 2026.

What it actually sells

Proofy provides online email address verification for individual addresses, uploaded lists, and automated workflows. Customers can “Check one address, verify an uploaded list, or automate verification inside your product.”

Businesses cleaning contact data before campaigns, database imports, and CRM updates are the stated customers. “Email verification helps remove bad addresses before campaigns, database imports, and CRM updates”

How it charges

Proofy offers pay-as-you-go pricing and subscriptions. “New users can start with 5,000 verification credits for $5 with no subscription required.” The credits never expire.

Where customers come from

The site offers Single Verification, Bulk, and Batch APIs, a JavaScript Widget, and webhook support. Full documentation is available at docs.proofy.io, and customer support is available through live chat or email.

What stands out

Proofy verifies uploaded CSV or TXT lists and provides downloadable segmented results. It also checks one email address instantly without a file upload and accepts uploaded text and CSV files up to 65 MB.

The checks cover address syntax, domain and MX records, the receiving mail server, and mailbox-level verification. Proofy also identifies invalid, risky, disposable, catch-all, and role-based addresses.

From the official site

Email verification helps remove bad addresses before campaigns, database imports, and CRM updates

Validate email addresses in real time through Proofy's REST API for forms, apps, CRMs, and automated workflows.

Excerpts from the official website, fetched October 1, 2026.

Where it sits in the data

Proofy's $3K a month is higher than 53% of the 6,604 projects with founder-reported monthly revenue in our dataset; the median across them is $2K. Snapshot: 2026-09-30. The dataset only covers founders who chose to publish their numbers, so it leans toward businesses that work; use it for scale, not as an average.

Currency

All figures are in US dollars as published. A rough yuan or euro conversion is not applied here because prices, taxes and acquisition costs differ by country.

Could you build something like this?

In my view, demand comes from businesses that need cleaner contact data before campaigns, database imports, and CRM updates. The buyer also includes product teams that need verification inside forms, applications, and automated workflows.

Distribution would require search around email verification, contact cleaning, form validation, CRM data, and API-based workflows. Building the service would require dependable verification infrastructure, secure handling of uploaded contact data, strong file and API operations, customer support, and compliance with privacy and data-protection requirements. Competition would come from other verification services and the verification features included in existing software products.

Verdict: Needs real work.

One thing to take from it

Proofy presents the same email-verification capability in several forms: a single-address checker, uploaded-list processing, REST API access, and a JavaScript widget. Its entry offer uses 5,000 verification credits for $5 with no subscription required.

Sources

Proofy official website, fetched October 1, 2026
Proofy pricing page, fetched October 1, 2026
Indie Hackers product page: revenue founder-reported on the Indie Hackers product page (not independently verified), as of September 30, 2026

Revenue, team and start-cost figures are what the founder reported at the interview date, not current figures and not a prediction of what you will earn. Product and pricing facts come from the business's own website as checked on 30 September 2026. Method & sources · Disclosure