PostGrid Address Verification vs QuantumDigital
PostGrid Address Verification
postgrid.comQuantumDigital
quantumdigital.comSide by side
| Figure | PostGrid Address Verification | QuantumDigital |
|---|---|---|
| Price from | $18/mo | — |
| Free plan | — | — |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | — |
| Plans published | 6 | 5 |
| Spec score · Postcard Maker Software | 7.8 (#8) | 7.4 (#14) |
| Integrations | The international service names Salesforce, Stripe, Dynamics 365, Shopify, and Zapier as integrations for address verification workflows. | Listed integration partners include Apination, Top Producer, Salesforce, ListHub, Reliance Network, Imprev, MoxiWorks and MarketSharp. |
| Support | The international product page advertises native SDKs, free sandbox testing, detailed API documentation, and a 99.9% uptime SLA. | The company says its business-hours support team provides a real person by phone and backs service with a WOW policy. |
Plans
PostGrid Address Verification
- Standard Essential$18 a month
- Standard Business$40 a month
- International Essential$70 a month
- Standard Growth$200 a month
- International Business$360 a month
- Standard EnterprisePriced on request
QuantumDigital
- Print / Ship API$0.10, paid once
- Direct Mail API$0.85, paid once
- EDDM 11" × 4.25"$35, paid once
- EDDM 8" × 6.5"$40, paid once
- EDDM 11" × 8.5"$49, paid once
In their own words
PostGrid Address Verification
PostGrid Address Verification checks, autocompletes, standardizes, and enriches addresses for delivery across the U.S., Canada, and 245+ countries and territories. It accepts structured fields, single-line freeform text, or incomplete entries and verifies against postal data in real time. Its international service supports CSV batches of up to one million addresses and can add geographic coordinates with rooftop-level accuracy. It supports non-Latin scripts including Chinese, Arabic, Japanese, and Korean, with conversion to standardized Roman scripts. Named integrations include Salesforce, Stripe, Dynamics 365, Shopify, and Zapier. Options include APIs and SDKs, a no-code dashboard, and self-hosting. Each verification, autocomplete, or standardization request counts as a lookup; monthly plans impose allowances and additional lookup charges beyond them. Standard Essential costs $18 a month billed yearly and includes 2,000 U.S. and Canada lookups monthly, with additional lookups at $0.02 each. Test API keys and 500 free lookup credits are available; a separate bulk verification service page describes 100 free lookups. The product page lists security and compliance provisions including HIPAA, PIPEDA, GDPR, SOC 2 Type 2, and PCI-DSS.
QuantumDigital
QuantumDigital is an online direct-mail service for designing, proving, printing, and sending postcards. Customers can upload a design or use free templates, then upload their own mailing list or use QuantumDigital’s verified U.S. national residential list. Campaigns can be scheduled weekly, monthly, or quarterly and targeted around listed properties or customer contacts. The company says postcards can enter the mail stream the next business day, with the same turnaround stated for API orders. Its APIs support USPS navigation, national consumer lists, uploaded designs or lists, and shipping small-order marketing materials. Measurement and personalization options include Intelligent Mail barcodes, QR codes, SMS marketing, personalized landing pages, coupon codes, and variable data. API pricing is $0.10 for Print / Ship API, minimum 20 pieces, and $0.85 for Direct Mail API, minimum one piece. EDDM formats are $35.00, $40.00, or $49, starting at 25,000+ pieces.