SendSure
Automated integration sync

Clean Lists. Auto-Pilot Mode.

Connect your CRM or ESP. We clean your data in the background — no exports, no reputation risk.

Over 50+ integrations supported

HubSpot
Mailchimp
+48
SYNC ACTIVE
jenny.rosen@example.com
Valid
admin@marketing.local
Role-Based
j.smith99@temp-mail.org
Disposable
Next scan: 00:00 UTC Auto-pilot
The challenge

The Manual Verification Cycle Is Broken

Export, verify, download, re-import — tedious, error-prone, and lists decay before your next send.

High Decay Rates

B2B lists decay 2.5% per month. Wait, and bounce rates spike.

Delayed Discoveries

Scrubbing right before a campaign means panic, ESP warnings, and delays.

The SendSure Solution
Fully automated

CRM
CRM Connection
Contacts ingested via OAuth
Validation Engine
Running 27+ checks per email
Processing
CRM Write-Back
Data enriched & synced instantly
100% clean
SendSure
SYNC
CRM
CRM
CRM
01. Integrate

Sync With Your Marketing Platform In Seconds.

  • Zero Coding Required

    Connect via OAuth or API tokens in under three clicks.

  • Deep Custom Mapping

    Map list segments and configure write-back fields (Contact Properties vs Tags).

02. Automate

Automatically Clean Your Email Lists.

  • Silent Extraction Engine

    Runs quietly in the background, pinging your ESP to find new and modified subscribers.

  • Intelligent Scrubbing

    New emails run through our verification engine, blocking risks instantly.

Rule executed
ESP
Tag Applied
`SendSure: Deliverable` added
Rule executed
ESP
Status Unsubscribed
Contact globally blocked
Daily Scan
Every day at 00:00 UTC
Active
Weekly Run
Every Sunday
Monthly Deep Clean
1st of Month
03. Schedule

Schedule Your Scans. Set It And Forget It.

Daily, weekly, or monthly. List hygiene on autopilot, protecting your sender score.

High-performance architecture

Handle 10,000+ contacts

Built for scale. Read, clean, and write back your data automatically.

50+
Native integrations
Real-Time
Bi-directional writes
Unlimited
Lists per account
100% Free
Cached results

Connects To Your Stack

List validation on the tools you already use.

HubSpotSalesforceActiveCampaignMailchimpSendGridZapier
3-step setup

Connect Once. Stay Clean Forever.

1

Connect Your Platform

Link Mailchimp, HubSpot, Salesforce, and more via OAuth or API keys.

  • Secure OAuth 2.0 flows
  • 50+ direct integrations
2

Select & Configure

Pick the lists to keep clean, then set your cadence and write-back rules.

  • Granular list selection
  • Custom mapping rules
3

Continuous Protection

SendSure verifies new additions in the background and updates statuses back in your CRM.

  • Zero daily maintenance
  • Always-ready data
Cost efficient

Fair, Transparent Billing

Smart Caching Architecture

Why pay twice to verify the same address?

  • 100% Free Cached ResultsValid yesterday is free to sync today. We respect each address's TTL.
  • Only Pay For The Delta50 new signups on a 10,000 list? You're charged 50 credits.
Verification engine

Advanced Verification Infrastructure

Your CRM contacts run through our full email verification pipeline.

Universal B2B & B2C

Enterprise B2B addresses verified as effectively as B2C domains.

Global Reach

Handles international characters and pings foreign mail servers securely.

Proprietary Bypassing

Bypasses strict mail server greylisting natively without false positives.

Resilient Testing Network

A diverse network of nodes improves latency and prevents blocks.

Adaptive Intelligence

Cross-references evolving spam traps and disposable networks.

High-Velocity Pipeline

Verifies millions of records without triggering CRM rate limits.

Frequently Asked Questions

Our syncing architecture, explained

SendSure pulls your lists from Mailchimp or HubSpot for verification, then pushes results back — updating custom fields or applying tags so you can segment invalid emails without manual exports.

Start auto-syncing today

Connect your CRM. We work in the background.