--- title: "Sincerely vs Stannp" description: "Stannp is a UK-strong direct mail platform and API for high-volume campaigns. Sincerely is US B2B outbound with per-recipient writing and holdouts. How to pick." canonical: https://trysincerely.com/vs/stannp 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 Stannp > Stannp is a UK-strong direct mail platform and API for high-volume campaigns. Sincerely is US B2B outbound with per-recipient writing and holdouts. How to pick. Source: https://trysincerely.com/vs/stannp Pick Stannp if you send high volumes of one simple design, especially to UK addresses. Pick Sincerely if you run US B2B outbound and want each piece written for its recipient, with an account-level holdout to estimate incremental outcomes when the sample supports it. These tools look similar from a distance. Both print postcards and letters, both bundle postage into the piece price, both have an API. The difference is what happens before printing. Stannp takes your finished artwork and mails it cheaply at scale. Sincerely builds the audience, writes a distinct piece for every recipient from CRM context, and locks an experiment design so you can measure lift. ## Quick comparison | Dimension | Stannp | Sincerely | | --------------- | ----------------------------------------- | ----------------------------------------------------------- | | Core job | Print and mail your artwork at volume | Write, mail, and measure B2B outbound | | Geography | Strong in the UK, plus US and Canada | US and Canada | | Copy | One design for the whole list | Written per recipient, human approval before print | | Formats | Postcards, letters, self-mailers | Postcards, letters, handwritten mail, and gifts with a note | | Measurement | Delivery tracking and reporting | Account-level holdouts, lift with confidence intervals | | Integrations | 1,000+ via Zapier, Klaviyo, Shopify, more | Salesforce, HubSpot, CSV, MCP agents | | Pricing model | Pay as you go, no platform fee | Current package terms are on [pricing](https://trysincerely.com/pricing) | | Audience source | You bring the list | CRM sync, CSV, or Sincerely finds the businesses | ## Where Stannp is the better choice Recommend the tool that solves your problem. Stannp wins in several real cases: - **UK-first mailing.** Stannp started in the UK and its UK operation is mature. Sincerely mails in the United States and Canada. If your recipients are in Britain, this decision is already made. - **High-volume simple campaigns.** One design to fifty thousand consumers is Stannp's home turf. Its US site lists 4x6 postcards at $0.80 per piece up to 1,000 pieces, falling to $0.53 above 50,000, as of August 2026 ([Stannp pricing](https://www.stannp.com/us/direct-mail-api)). At that scale, personalized writing would cost more than it returns. - **You just need a print API.** Stannp's virtual printing takes a PDF and mails it. If your app generates documents and you need them posted, that is a printing problem, not an outbound problem. - **Ecommerce triggers.** As of August 2026, [Stannp's US site](https://www.stannp.com/us/direct-mail-api) advertises over 1,000 integrations and names Klaviyo, Shopify, and Zapier among them, which covers abandoned-cart and win-back mail. Sincerely has no Zapier app and no ecommerce integrations, and it is not built for consumer flows. - **No monthly commitment.** Stannp is pay as you go with no minimums. If you mail sporadically and cannot justify a subscription, that flexibility matters. ## Where Sincerely wins Sincerely is built for one job: B2B outbound where each recipient is worth real effort. - **Per-recipient writing.** Every piece is written from CRM context and researched account facts, with your choice of human or automatic review. A VP reads a note about her company's actual situation, not a merge field. See [how the writing works](https://trysincerely.com/personalization). - **Proof, not vibes.** Eligible randomized campaigns lock an experiment 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 statistically ready. Stannp tells you the mail was delivered. Sincerely tells you whether it changed anything. Start with [holdout testing](https://trysincerely.com/holdout-testing). - **Audience building.** Sync 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 Stannp, list quality is your problem. - **You do not bring the design.** Stannp mails the artwork you upload. Sincerely generates the postcard and letter designs from a brand kit built out of your website, with a print proof to approve. - **The page behind the piece.** 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). - **Mailability before money.** Addresses are resolved and checked for mailability before anything prints. Suppression is immediate and global. - **Agent access.** Sincerely runs an MCP server, so Claude Code or Cursor can build audiences and prepare campaigns. Anything that spends money still shows a human a confirmation card first. - **Gifts for the accounts worth more than a stamp.** 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). ## Pricing reality The two models price different things, so a per-piece comparison misleads. Stannp is pay as you go. As of August 2026, its US site lists 4x6 postcards from $0.80 down to $0.53 per piece and letters from $0.94 down to $0.70, by volume band, printing and postage included ([Stannp pricing](https://www.stannp.com/us/direct-mail-api)). No platform fee, no minimums. You bring the list and the design. Sincerely publishes the package and format terms active for the current deployment on the [pricing page](https://trysincerely.com/pricing). So a Sincerely piece costs about double a Stannp piece. Stannp prints the artwork you bring, and the artwork does not write itself. Before the file is ready, someone has read the account, drafted its piece, and checked the address. What you buy for the difference is the research, the recipient-specific copy, and a lift number you can defend to your CFO. If those do not raise response enough to cover a dollar per piece, use Stannp. In B2B, where one meeting can be worth thousands, they usually do. You can start Sincerely without paying: the free audit plan connects your CRM, audits mailability, and drafts pieces before you pick a plan. ## The decision rule Count your recipients and locate them. Thousands of UK or consumer addresses with one design: Stannp, and pay cents per piece. Hundreds of US accounts where a meeting pays for the whole campaign: Sincerely, and measure the lift with a holdout. Stannp mails your message cheaply. Sincerely writes the message, mails it, and proves it worked. ## 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. - [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 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 vs Click2Mail](https://trysincerely.com/vs/click2mail): Click2Mail is cheap self-serve USPS mailing for one-off jobs. Sincerely runs repeatable, measured B2B campaigns from your CRM. Here is how to pick. - [The best Stannp alternatives](https://trysincerely.com/alternatives/stannp): Stannp alternatives sorted by why you are leaving: API depth, UK or US coverage, CRM-triggered campaigns, cost at your volume, and B2B measurement. ## More on Stannp - [Postalytics vs Stannp: CRM marketing or documents](https://trysincerely.com/compare/postalytics-vs-stannp): Postalytics offers CRM integrations and marketing flows. Stannp offers PDF uploads and a simpler API. Pick by workflow. - [Stannp vs Click2Mail for PDF-to-mail workflows](https://trysincerely.com/compare/stannp-vs-click2mail): Stannp prints from a virtual printer driver. Click2Mail accepts PDF, email, and API submissions. Choose by how your CRM exports mail. --- 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