--- 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: 2026-08-18 --- # 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 a holdout to prove the mail worked. 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 | | Copy | One design for the whole list | Written per recipient, human approval before print | | Formats | Postcards, letters, self-mailers | Handwritten notes, 4x6 and 6x9 postcards, letters | | 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 | Monthly plans with included pieces | | 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 US. 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, then approved by a human before it prints. A VP reads a note about her company's actual situation, not a merge field. See [how the writing works](https://trysincerely.com/writing). - **Proof, not vibes.** Campaigns lock an experiment 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 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 and verified addresses. With Stannp, list quality is your problem. - **Mailability before money.** Addresses are resolved, scored, and USPS-verified 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. ## 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 sells plans that include the writing, research, measurement, and mail. 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. Past the included pieces, 4x6 postcards run $1.00 to $1.75 depending on plan. Unused pieces roll over up to one extra month, and there is no per-seat pricing. Full detail on [the pricing page](https://trysincerely.com/pricing). So a Sincerely piece costs about double a Stannp piece. 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. --- 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.