--- title: "Sincerely vs PostGrid" description: "PostGrid is a print-and-mail API for developers. Sincerely runs the whole direct mail channel for revenue teams. Here is how to pick." canonical: https://trysincerely.com/vs/postgrid last_updated: 2026-10-08 --- > 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. # Sincerely 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. Source: https://trysincerely.com/vs/postgrid Pick PostGrid if your developers want to build a mail workflow on an API, or if you need address verification as a standalone product. Pick Sincerely if you want the direct mail channel run for you: audience building, writing, printing, and measurement, aimed at B2B revenue teams. Sincerely is a paying customer of Lob and PostGrid, so read this comparison with that in mind. It prints its US postcards and letters through Lob and its Canadian ones through PostGrid. These are different products that happen to touch the same production layer. PostGrid sells infrastructure. Sincerely sells outcomes on top of managed fulfillment. This page is really "build on an API vs buy the channel". ## Quick comparison | Dimension | PostGrid | Sincerely | | -------------------- | ------------------------------------------------- | ------------------------------------------------------------------- | | What it is | Print-and-mail API plus address verification APIs | Managed direct mail platform for B2B outbound | | Who runs it | Your developers | Your revenue team, no code | | Writing | You supply the content | Written per recipient from CRM context, human approved | | Formats | Letters, postcards, checks | Postcards, letters, handwritten mail, and gifts with a note | | Audience | You bring addresses | Syncs from Salesforce, HubSpot, or CSV, or finds businesses for you | | Measurement | Delivery tracking | Holdout experiments with lift and confidence intervals | | Address verification | Standalone API, 245+ countries | Included on every plan, checked for mailability before print | | Entry price | Free tier, pay per piece | Current package terms are on [pricing](https://trysincerely.com/pricing) | ## Where PostGrid is the better choice Be honest with yourself about which problem you have. PostGrid wins in these cases: - **You are a developer who wants to own the workflow.** PostGrid is a clean REST API for letters, postcards, and checks. [PostGrid's site](https://www.postgrid.com/) says mail is processed and handed to the carrier within two business days, as of August 2026. If mail is a feature inside your product, an invoice run, a compliance letter, a renewal notice, you want an API. Sincerely is not that. Read [the direct mail API guide](https://trysincerely.com/guides/direct-mail-api) for the build path. - **You need address verification as a product.** PostGrid sells CASS-certified verification, autocomplete, and geocoding as their own APIs. As of August 2026, [its site](https://www.postgrid.com/) advertises coverage of 245+ countries and bulk runs of up to 200,000 addresses at a time. If you only need to clean addresses, buy that and stop. - **You send checks or transactional mail.** Statements, notices, checks: this is operational mail, not marketing. PostGrid serves healthcare, insurance, and financial services for exactly this. - **You want a free start with real sends.** As of August 2026, [PostGrid's pricing page](https://www.postgrid.com/pricing-print-mail/) lists a Starter tier at $0 per month covering one user, up to 500 mailings a month, and up to 50 checks, all at per-piece rates. If two or more of these describe you, use PostGrid. Or compare it against Lob first: [Lob vs PostGrid](https://trysincerely.com/compare/lob-vs-postgrid). ## Where Sincerely wins PostGrid hands you a printer with an API. Everything that makes direct mail actually produce pipeline is still your job: finding the accounts, resolving business addresses, writing something worth reading, timing the send, and proving it moved revenue. Sincerely does that work. - **The audience builds itself.** Sync from Salesforce or HubSpot, upload a CSV, or describe your ideal customer and Sincerely finds the businesses, contacts, and addresses, each address held for review before it can mail. With PostGrid, you arrive with a finished address list. - **The writing is done for you.** Every piece is written for one recipient from CRM context and researched account facts. A human approves before anything prints. With an API, your team writes every template and merge field. - **Measurement is an experiment, not a delivery report.** Eligible randomized campaigns lock a design at launch: primary outcome, window, holdout percentage. Other campaign types use descriptive reporting. Readouts report lift against account-level holdouts with confidence intervals, and say plainly when a result is not ready. See [measurement](https://trysincerely.com/measurement) and [holdout testing](https://trysincerely.com/holdout-testing). PostGrid tells you a piece was delivered. It cannot tell you whether it worked. - **The design is generated, not supplied.** An API expects finished artwork. Sincerely generates the postcard and letter designs from a brand kit built out of your website, with a print proof your team approves. - **The page behind the piece is hosted too.** On an API you would build and host the landing page yourself. Each printed postcard and letter can carry a QR code and short link that opens a page Sincerely hosts for the intended recipient, or redirects to your site once Sincerely records the visit. See [landing pages](https://trysincerely.com/landing-pages). - **No engineering time.** No API integration, no template code, no webhook handling. A revenue team launches a campaign the day the CRM connects. - **Gifts without another vendor.** Sincerely also sends gifts: 46 physical gifts with a personalized note, prices starting at $49, and the exact price shown before confirmation, in the United States and Canada. See [gifts](https://trysincerely.com/gifts). Sincerely also runs as an MCP server, so an agent like Claude Code can build audiences and prepare campaigns, with a human confirmation gate before anything spends money. ## Pricing reality PostGrid, as of August 2026: the starter tier is $0 per month for up to 500 mailings, and you pay per piece. A black-and-white first-class letter runs $1.059 and a 4x6 first-class postcard $0.902 in the US. Enterprise pricing is custom. Details are on [PostGrid's pricing page](https://www.postgrid.com/pricing-print-mail/). Those per-piece prices look cheap next to Sincerely's, but they buy printing only. Add the engineering time to integrate, the list you still have to build, the copy you still have to write, and the attribution you still have to invent. Sincerely publishes the package and format terms active for the current deployment on the [pricing page](https://trysincerely.com/pricing). ## The decision rule Count your engineers and name your goal. If mail is a feature in your product and you have developers to own it, buy PostGrid's API. If mail is a revenue channel and you want pipeline without building anything, buy Sincerely. If you are torn between building on an API and buying the channel, the [build vs buy page](https://trysincerely.com/vs-lob) walks through the same tradeoff against another print API. PostGrid sells you the printing press. Sincerely sells you the finished campaign and the proof it worked. ## Related questions - [The best PostGrid alternatives](https://trysincerely.com/alternatives/postgrid): PostGrid alternatives for direct-mail APIs and campaign platforms, organized by developer, marketer, and B2B team needs. - [PostGrid vs Stannp for direct mail APIs](https://trysincerely.com/compare/postgrid-vs-stannp): 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. - [Sincerely vs Inkit](https://trysincerely.com/vs/inkit): Inkit pivoted from direct mail to document generation and e-signatures. Sincerely is a live B2B direct mail platform. Here is the honest comparison. - [Sincerely vs Postalytics](https://trysincerely.com/vs/postalytics): Postalytics automates template-based mail at self-serve prices. Sincerely writes each piece for one recipient and measures the lift with holdouts. - [Sincerely vs Postie](https://trysincerely.com/vs/postie): Postie is built for consumer acquisition at scale. Sincerely is built for B2B revenue teams. Here is how to pick between them, with honest pricing for both. ## More on PostGrid - [Lob vs PostGrid, the print-and-mail API comparison](https://trysincerely.com/compare/lob-vs-postgrid): A neutral head-to-head of Lob and PostGrid as print-and-mail APIs, covering coverage, address verification, docs, pricing transparency, and scale. - [Postalytics vs PostGrid: campaigns or operational mail](https://trysincerely.com/compare/postalytics-vs-postgrid): Postalytics automates campaigns for marketers. PostGrid combines print, mail, and address tools for operations teams. - [PostGrid vs Click2Mail for programmatic mail workflows](https://trysincerely.com/compare/postgrid-vs-click2mail): Choose PostGrid for standalone address tools and multi-country networks; choose Click2Mail for USPS document variety and office-integrated workflows. --- 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