PostGrid
Direct mail and address verification APIs for offline communications
Founded
2020
Starting Price
Free
Category
Automation & Integration
Last updated May 17, 2026
About PostGrid
PostGrid is an offline communication platform offering REST APIs for direct mail automation (letters, postcards, checks) and address verification across 245+ countries. It helps businesses in healthcare, insurance, finance, real estate, and e-commerce send personalized physical mail at scale and validate addresses with CASS- and SERP-certified accuracy.
Pros & Cons
Pros
- Single platform for both direct mail and address verification
- International coverage across 245+ countries
- CASS and SERP certified for compliance-sensitive industries
- HIPAA-compliant workflows suited to healthcare and insurance
- Strong API documentation with Zapier and webhook support
Key Features
Print & Mail API
Automate sending letters, postcards, checks, and certified mail through a REST API with 2-day SLA.
Address Verification API
CASS- and SERP-certified verification, standardization, and parsing for US, Canada, UK, Australia, and 245+ countries.
Address Autocomplete
Real-time address autocompletion to reduce form errors and improve checkout conversion.
Bulk Address Verification
Verify up to 200,000 addresses at once via batch upload or API.
HIPAA Compliance
HIPAA-compliant mailing workflows for healthcare and insurance use cases.
Personalization & Templates
Variable data printing with HTML templates and merge variables for fully personalized mail pieces.
Tracking & Webhooks
Track mail status from rendering through USPS delivery with webhook notifications.
Pricing
Free Tier
Free
- 100 test requests
- No credit card required
- Full API access in test mode
- Documentation and sandbox
Pay Per Piece
Custom
Best For
Automated Customer Communications
Trigger physical letters and postcards from CRM events for onboarding, renewals, or win-back campaigns.
Healthcare and Insurance Notices
Send HIPAA-compliant patient notices, EOBs, and policy documents at scale via API.
Address Validation at Checkout
Validate and autocomplete customer addresses on e-commerce checkout to cut failed deliveries.
Bulk Address Cleansing
Cleanse and standardize large customer databases before mailing campaigns or data migrations.
