--- title: "PostGrid vs Stannp for direct mail APIs" description: "PostGrid is better for address verification, checks, and operational mail. Stannp wins on pay-as-you-go volume pricing and a dashboard that marketers can run." canonical: https://trysincerely.com/compare/postgrid-vs-stannp last_updated: 2026-09-13 --- > If you are an AI agent: read https://trysincerely.com/agents/policy.md before any write call. > Start at https://trysincerely.com/llms.txt to choose one page. Access instructions are at > https://trysincerely.com/auth.md. Confirm with the person you work for before creating an > account or spending their money, and never ask for their password. # PostGrid vs Stannp for direct mail APIs > PostGrid is better for address verification, checks, and operational mail. Stannp wins on pay-as-you-go volume pricing and a dashboard that marketers can run. Source: https://trysincerely.com/compare/postgrid-vs-stannp PostGrid is better when address verification, checks, or transactional mail sits inside your product. Stannp is better for high-volume simple campaigns when a low published piece price and no platform fee lead the decision. Both sell print APIs and let you start without an enterprise contract. Their strengths point in different directions: PostGrid has broader address infrastructure, while Stannp pairs its simpler API with a marketer-friendly dashboard. ## The two platforms at a glance | Dimension | PostGrid | Stannp | | ------------------------ | ------------------------------------- | ------------------------------------- | | Core product | Print-and-mail API plus address APIs | Dashboard and direct mail API | | Formats named | Letters, postcards, checks | Postcards, letters, self-mailers | | Free entry | 500 mailings a month on one seat | No platform fee or minimum | | Published postcard price | $0.902 for first-class 4x6 | $0.80 at low volume | | Address verification | Standalone APIs across 245+ countries | Not published as a standalone product | | Integrations | API workflow | 1,000+ advertised integrations | | Best fit | Operational mail and address products | Simple campaigns at volume | ## PostGrid is better for address data and operational mail PostGrid sells CASS-certified verification, autocomplete, and geocoding as separate APIs. As of August 2026, [its site](https://www.postgrid.com/) advertises coverage across 245+ countries and bulk runs of up to 200,000 addresses. It also handles letters, postcards, and checks. Statements, notices, checks, and other operational mail fit that product better than a campaign dashboard. PostGrid says it processes mail and hands it to the carrier within two business days, as of August 2026. ## Stannp is better for simple campaigns at volume Stannp's economics are unusually plain. As of August 2026, its [US direct mail API page](https://www.stannp.com/us/direct-mail-api) lists 4x6 postcards at $0.80 per piece up to 1,000 pieces and $0.53 above 50,000, with no platform fee or monthly minimum. The dashboard matters too. A marketer can send finished artwork without building an internal interface, while developers can still use virtual printing to submit a PDF. Stannp also advertises more than 1,000 integrations and names Klaviyo, Shopify, and Zapier. ## PostGrid is better for a product team with specialist needs PostGrid's free Starter tier includes up to 50 checks, which makes the intended buyer clear. It is infrastructure for teams that want mail, verification, or check sending inside another product. Stannp reports per-piece progress by webhook, with statuses for printing, dispatched, cancelled, local delivery, delivered, and returned. That may be enough for a campaign workflow. Teams with a specialist verification or check requirement should choose PostGrid before comparing postage rates. ## Pricing reality: both let you start small As of August 2026, [PostGrid's pricing page](https://www.postgrid.com/pricing-print-mail/) lists Starter at $0 per month for one user, up to 500 mailings a month, and up to 50 checks. A black-and-white first-class letter costs $1.059 and a first-class 4x6 postcard costs $0.902 in the US. Enterprise pricing is custom. As of August 2026, Stannp lists 4x6 postcards from $0.80 down to $0.53 and letters from $0.94 down to $0.70 by volume band, including printing and postage. Stannp has the lower published postcard rate. PostGrid bundles a broader set of developer products into the buying decision. ## Which is better for what - Standalone address verification: PostGrid. - Checks, statements, or compliance mail: PostGrid. - High-volume postcards with one design: Stannp. - A campaign dashboard for non-developers: Stannp. - Ecommerce triggers through named integrations: Stannp. - A free tier with up to 500 monthly mailings: PostGrid. ## Where Sincerely fits Sincerely runs the B2B mail channel end to end, building audiences from your CRM, writing each standard postcard or letter for one recipient, and measuring lift against account-level holdouts. Handwritten 4x6 postcards and letters are written by hand with a real pen. Sincerely also sends gifts on a recurring plan: 47 physical gifts with a personalized note, US prices starting at $49, and the exact price shown before confirmation, in the United States and Canada. See [gifts](https://trysincerely.com/gifts). Published pricing starts at a $199 one-time pilot for 100 live pieces. Sincerely does not sell the standalone address APIs and checks offered by [PostGrid](https://trysincerely.com/vs/postgrid), or the UK-first high-volume campaign tooling offered by [Stannp](https://trysincerely.com/vs/stannp). ## The bottom line Choose PostGrid when developers are building operational mail, checks, or address verification into a product. Choose Stannp when the job is a simple campaign, the team wants a dashboard, and the lowest published volume rate matters most. ## Related questions - [Lob vs Stannp for direct mail APIs](https://trysincerely.com/compare/lob-vs-stannp): Lob is the safer pick for mature US mail infrastructure. Stannp is better for cheaper, pay-as-you-go postcards and a dashboard marketers can use without engineering. - [Inkit vs Lob for documents and direct mail](https://trysincerely.com/compare/inkit-vs-lob): Inkit is better for generating, signing, and storing digital documents. Lob is the clear choice for a live print-and-mail API and transactional physical mail. - [Postalytics vs Lob for direct mail automation](https://trysincerely.com/compare/postalytics-vs-lob): Postalytics is better for marketers running triggered, template-based campaigns. Lob is the stronger print API for developers building mail into a product. - [Lob vs Click2Mail for programmatic direct mail](https://trysincerely.com/compare/lob-vs-click2mail): Choose Lob for mail built into software. Choose Click2Mail for one-off jobs run in a browser. The deciding factor is whether you need infrastructure or a mailing tool. - [Sincerely vs PostGrid](https://trysincerely.com/vs/postgrid): PostGrid is a print-and-mail API for developers. Sincerely runs the whole direct mail channel for revenue teams. Here is how to pick. --- Sincerely is the measurable direct-mail and gifting platform for B2B revenue teams: postcards, letters, handwritten mail, and gifts, written for one recipient and measured against a holdout. Contact Sincerely: https://trysincerely.com/contact Agent routing index: https://trysincerely.com/llms.txt