In mid-2025, Proofy shipped its largest platform update since the service launched. The headline numbers are speed and accuracy, but the real story is everything underneath — a rebuilt admin panel, a new file format, higher file size limits, tighter Zapier integration, and an API overhaul that makes real-time verification more reliable in production. This post documents the changes, what motivated them, and what they mean for different types of senders.
Speed and Accuracy
The core verification engine was rebuilt for the 2025 release. The result is faster processing at scale and higher accuracy on edge cases — particularly around catch-all domains, where the previous engine produced a higher rate of ambiguous results. The new engine handles the same catch-all pattern with a disposition that most senders can act on directly. For lists heavy with business addresses, this means fewer unknowns sitting in the results that require a judgment call.
Accuracy improvements extend to role address detection (postmaster@, info@, abuse@) and syntax checking on obscure but valid TLDs. The previous engine had gaps in both areas that showed up in edge-case audits; the 2025 engine closes those gaps.
Rebuilt Admin Panel
The dashboard received its most significant redesign since launch. The primary changes are structural: navigation is reorganized around task flows rather than feature categories, and the verification history view is now filterable and exportable without leaving the panel. Users who manage multiple lists for different clients or purposes will find the new structure substantially faster to navigate. The credits and usage display moved to a persistent header element, so account status is visible without navigating to a separate settings page.
CSV Now Supported
The platform previously required Excel-format (.xlsx) uploads for bulk verification. The 2025 update adds native CSV support, which removes a conversion step for users who export contact lists from CRMs, marketing platforms, or databases. CSV files upload and process identically to .xlsx — column mapping is auto-detected, and the result download is available in both formats. For most users, this removes the only reason to open a spreadsheet before verifying.
Higher File Size Limit: Up to 65 MB
From 10 MB to 65 MB. The previous file-size cap forced large lists into multiple uploads. The new bulk verification handles files up to 65 MB in a single pass — enough for most six-figure subscriber lists without splitting. For users who previously managed large lists by chunking, this eliminates a significant operational overhead.
Zapier Integration Improvements
Verify contacts as they enter your existing stack via Zapier. Proofy is a native Zapier app, which is how it plugs into Mailchimp, HubSpot, and other platforms without custom code. The 2025 update improves the trigger reliability and reduces the latency of verification results returned to Zaps, which matters for workflows where verification gates a downstream action (adding a contact to a sequence, triggering a welcome email, etc.).
API Changes
The Proofy API received a full version update. Key changes: response time is faster under normal load, rate limiting is more predictable, and the response schema now includes a confidence_score field for verification results that fall in ambiguous territory (catch-alls, disposables with inconsistent behavior). The confidence_score is particularly useful for high-volume senders who need to triage ambiguous results programmatically rather than reviewing them manually. Full reference documentation is in the email validation API docs. The previous API version remains active for a transition period; documentation for both versions is available in the developer portal.
What This Means in Practice
For senders running outreach at scale, the combined effect of faster processing, higher accuracy on catch-alls, and native CSV support translates into a more reliable pre-send workflow. Running verification the day before a campaign launch rather than a week out is more practical now — the turnaround is faster and the results are more actionable. For teams managing lists that grow continuously through inbound forms or CRM imports, the Zapier reliability improvements mean verification can run in the background without manual intervention, maintaining steadier inbox placement across every mailbox provider. Teams new to verification can start with free validation credits to test the impact before committing to a paid plan. The cumulative effect across a quarter of campaigns is usually larger than any single feature suggests.
Migrating From the Old Account
The 2025 platform runs on a new backend. If you created your account before the migration date, log in and follow the prompt to migrate your account data. The migration preserves credit balances, verification history, and API keys. Custom integrations built on the previous API version will continue to work during the transition period; the developer documentation includes a migration guide for the breaking changes in the new schema.
FAQ
Is the new API backward compatible?
Not fully. The response schema changed to add the confidence_score field and reorganize some existing fields. The migration guide in the developer portal documents every breaking change and includes code samples for the most common update patterns.
Are existing Zapier integrations affected?
No. Existing Zaps continue to work without modification. The reliability and latency improvements apply automatically. If you’re building a new Zap, use the updated trigger and action configuration documented in the Zapier app listing.
What happens to credits from the old account?
Credits migrate automatically as part of the account migration. No action is required beyond completing the migration prompt in the dashboard.
When does the old API version sunset?
The transition period is documented in the developer portal. Proofy has committed to a minimum notice window before decommissioning the old version; API users who need a longer runway should contact support.
Related reading: MailerLite integration and HubSpot CRM integration.
