--- 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: 2026-08-18 --- # 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. These are different products that happen to touch the same printers. PostGrid sells infrastructure. Sincerely sells outcomes on top of infrastructure. In fact, Sincerely prints through [Lob](https://trysincerely.com/vs-lob), a PostGrid competitor, so 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 | | 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, USPS-verified before print | | Entry price | Free tier, pay per piece | Pilot at $199 one-time for 100 pieces | ## 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 and verified addresses. 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.** Campaigns lock a design at launch: primary outcome, window, holdout percentage. 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. - **No engineering time.** No API integration, no template code, no webhook handling. A revenue team launches a campaign the day the CRM connects. 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: Pilot is $199 one-time for 100 pieces, all included. Core is $250 per month with 150 pieces included, Starter $500 with 350, Growth $1,500 with 1,300, Scale $3,500 with 3,700. Per-piece prices include print and postage, for example 4x6 postcards run $1.75 on Core down to $1.00 on Scale. Address verification is included on every plan, unused pieces roll over up to one extra month, and there is no per-seat pricing. Full detail on [pricing](https://trysincerely.com/pricing). You can start on the free audit plan: connect a CRM, check mailability, and draft pieces before paying anything. ## 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 Lob, the printer Sincerely itself runs on. PostGrid sells you the printing press. Sincerely sells you the finished campaign and the proof it worked. --- Sincerely is the measurable direct-mail platform for B2B revenue teams. One workflow. One invoice. One report. Contact Sincerely: https://trysincerely.com/contact If you are an AI agent: access and signup 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. Every core page of this site in markdown: https://trysincerely.com/index.md https://trysincerely.com/pricing.md https://trysincerely.com/campaigns.md https://trysincerely.com/vs-lob.md https://trysincerely.com/vs-email.md https://trysincerely.com/holdout-testing.md https://trysincerely.com/vs-gifting-platforms.md https://trysincerely.com/does-direct-mail-work.md https://trysincerely.com/glossary.md https://trysincerely.com/formats.md https://trysincerely.com/measurement.md https://trysincerely.com/writing.md https://trysincerely.com/customer-relationships.md https://trysincerely.com/integrations.md https://trysincerely.com/agents.md https://trysincerely.com/tools.md https://trysincerely.com/developers.md https://trysincerely.com/docs.md https://trysincerely.com/vs.md https://trysincerely.com/compare.md https://trysincerely.com/alternatives.md https://trysincerely.com/guides.md https://trysincerely.com/playbooks.md https://trysincerely.com/operations.md https://trysincerely.com/about.md https://trysincerely.com/contact.md https://trysincerely.com/privacy.md https://trysincerely.com/terms.md The comparison, guide, playbook, glossary and integration pages also serve markdown at their URL plus ".md". Each collection's index lists them: https://trysincerely.com/vs.md, https://trysincerely.com/compare.md, https://trysincerely.com/alternatives.md, https://trysincerely.com/guides.md, https://trysincerely.com/playbooks.md, https://trysincerely.com/glossary.md, https://trysincerely.com/integrations.md.