PostGrid vs Stannp
An independent, review-free comparison compiled by the SaaSTracker editorial team. Both products are profiled in full, and neither can pay for placement here.
The short answer
Both sides assessedPostGrid compared with Stannp
Stannp publishes a full self-serve ladder from $0 to $315 a month with per-volume rate tables and prints in the US, UK, and Canada, which is exactly what PostGrid does not do. PostGrid has the better API, the better address product, and the compliance coverage. A UK or cross-border sender who wants a visible price should start at Stannp; a US technical team building against an endpoint should start at PostGrid.
Stannp compared with PostGrid
PostGrid has far better address verification and NCOA, HIPAA and Canadian health compliance, cheque printing, and a stronger API, but publishes nothing between a 500-piece free plan and an Enterprise quote. Stannp publishes a full ladder and posts internationally. Choose PostGrid for regulated or transactional mail in code; choose Stannp when you want a visible price at every volume.
Choose PostGrid if
Developer-led teams in healthcare, insurance, fintech, and B2B SaaS that need compliant transactional mail triggered by application events, and any small business whose real problem is a dirty address list rather than a print vendor.
Choose Stannp if
Small and mid-sized businesses that want a real self-serve direct mail rate card with no sales call, especially UK, Canadian, and cross-border senders, and anyone whose volume sits in the awkward middle where a $200 monthly platform fee cannot be justified.
Side by side
13 attributes| Attribute | PostGrid | Stannp |
|---|---|---|
| Category | Gifting | Gifting |
| Starting price | $0 per month with 4x6 postcards at $0.902 each (free plan available) | $0 per month, with a colour letter at $0.99 including postage (free plan available) |
| Pricing model | Free platform plan plus per-piece pricing with printing and postage included. Address verification is a separately priced product. Above 500 mailings a month there is no published tier, only a quoted Enterprise plan. | Pay as you use with no minimum spend or contract, plus optional subscription tiers that buy down the per-piece rate. Per-piece prices include production, printing, postage, and mailing, with full colour standard and Economy Class postage included. Rates step down by volume band within each plan. |
| Free plan | Starter: $0 per month, one user, ten templates, a single delivery network, and up to 500 mailings per month at standard per-piece rates. | Free: $0 per month, no minimum spend, no contract, standard rates with a colour 8.5x11 letter at $0.99 including production, printing, postage, and mailing. |
| Free trial | No time-limited trial; the free Starter plan is the evaluation path and is usable in production | No time-limited trial; the free plan is the evaluation path and sends real mail with no minimum spend |
| Best for | Developer-led teams in healthcare, insurance, fintech, and B2B SaaS that need compliant transactional mail triggered by application events, and any small business whose real problem is a dirty address list rather than a print vendor. | Small and mid-sized businesses that want a real self-serve direct mail rate card with no sales call, especially UK, Canadian, and cross-border senders, and anyone whose volume sits in the awkward middle where a $200 monthly platform fee cannot be justified. |
| Setup time | An afternoon for a developer to get a test postcard rendering and a live one in the mail. Longer if you are also cleaning a list, because bulk verification and NCOA on a large file is the step that actually takes days. | Under an hour to a first send. Create an account in your region, upload a list, choose a format, see the calculator price, and dispatch. Connecting an integration adds an hour or so depending on the source system. |
| Learning curve | Moderate and front-loaded. The API itself is conventional REST and reads quickly. The genuinely unfamiliar parts are postal ones: mail class selection, presort eligibility, what CASS certification does and does not guarantee, and why a technically valid address can still be undeliverable. | Low. The interface is a conventional campaign builder and the pricing calculator does most of the explaining. The subtleties worth learning are the volume bands, since a job sitting just under 1,000 or 10,000 pieces is often worth padding slightly to cross a band boundary. |
| Platforms | Web dashboard, REST API, Language SDKs, Bulk CSV upload, Webhooks | Web application, REST API, Regional US, UK, and Canadian storefronts, Over a thousand integrations, CSV upload |
| Compliance | SOC 2, HIPAA, PHIPA, PIPEDA, GDPR, USPS CASS certified | Postal standards in the US, UK, and Canada, Address verification against postal databases |
| Founded | 2020 | 2014 |
| Headquarters | Boston, Massachusetts, with Canadian origins in Toronto and operations across the USA, Canada, the UK, and Australia | United Kingdom origin, with US operations listed in Denver, Colorado and dispatch across the US, UK, and Canada |
| Ownership | Privately held | Privately held |
Strengths and limitations
PostGrid
Strengths
- Address verification is a real product rather than a checkbox: CASS certified, NCOA, delivery point validation, residential flagging, geocoding, and 250-plus country coverage, which directly attacks the largest source of waste in direct mail.
- The free Starter plan is a usable production plan with the full API, not a crippled demo, and 500 mailings a month covers a genuine small-business transactional programme.
- Compliance breadth is unusual for a self-serve product: HIPAA, PHIPA, PIPEDA, GDPR, and SOC 2 make it viable for healthcare and financial notices that most marketing-first mail vendors cannot touch.
- Three independent attribution signals, carrier tracking plus personalized QR codes plus pURLs, which is more resolution than most competitors offer.
Limitations
- The pricing ladder has a hole in it. Free up to 500 pieces a month, then nothing published until Enterprise, so the exact moment your programme starts working is the moment you enter a sales cycle.
- International postage is not published at all, which makes any cross-border programme unmodellable from the outside despite the excellent international address coverage.
- The product is written for developers. The dashboard exists but the documentation, the template model, and the error surface all assume someone comfortable with HTML and HTTP.
- No gifting capability whatsoever, which matters because buyers arrive at this category wanting one vendor for both jobs and PostGrid does exactly half of it.
Stannp
Strengths
- The most graduated pricing ladder in the category, with a $12 tier that fills the middle-volume gap every American competitor leaves open.
- Genuine multi-country operation with dispatch from the US, UK, and Canada, which makes it the default option for non-US and cross-border small businesses.
- Pay as you use with no minimum spend and no contract on any tier, so mail can be seasonal without carrying a subscription through quiet months.
- Per-piece prices include production, printing, postage, and mailing with full colour as standard, so there is no hidden colour surcharge or separate postage invoice.
Limitations
- Postcard and self-mailer prices are not published in a static table and come out of an on-site calculator, so you cannot fully model a campaign before creating an account.
- Developer experience trails the API-first competitors. The API exists and works, but documentation sits in a knowledge base rather than a dedicated developer site with SDKs and test environments.
- No published compliance programme, no SOC 2, and no HIPAA coverage, so regulated healthcare and financial mail should go elsewhere despite the healthcare vertical page.
- No Certified Mail, no signed proof of delivery, and no cheque printing, which rules out legally significant and disbursement mail.
Pricing compared
PostGrid
Free platform plan plus per-piece pricing with printing and postage included. Address verification is a separately priced product. Above 500 mailings a month there is no published tier, only a quoted Enterprise plan.
- Starter$0
- EnterpriseCustom
For a small business the free Starter plan is close to unbeatable: a production-grade mail API with test environments, HIPAA coverage, and CASS verification for no subscription, at $0.902 a postcard with postage in the price. Against a local print shop the comparison is not really about unit cost, which will be similar at a few hundred pieces, it is that the print shop cannot be triggered by a webhook and will not tell you whether piece 143 was delivered. The value falls apart at the transition point. A business sending 3,000 pieces a month has outgrown the free tier and has no published rate to grow into, which is where competitors with real middle tiers win on procurement friction alone.
Stannp
Pay as you use with no minimum spend or contract, plus optional subscription tiers that buy down the per-piece rate. Per-piece prices include production, printing, postage, and mailing, with full colour standard and Economy Class postage included. Rates step down by volume band within each plan.
- Free$0
- Starter$12
- Growth$48
- Premium$315
- EnterpriseCustom
Stannp's real advantage is not the lowest unit price, because Poplar and Lob both beat it on a US postcard. It is that the pricing ladder has rungs where the rest of the category has a cliff. A business sending 400 letters a month can pay $12 and get a volume rate, which at every American competitor would mean either staying on a free tier at the worst rate or paying $200-plus for a plan sized for someone ten times larger. Add multi-country dispatch, no minimum spend, and no contract, and this becomes the most flexible commercial structure in the category. Against a local print shop the maths at a thousand pieces is genuinely close, and the honest answer is that you are paying Stannp for address verification, automation triggers, and the fact that you never have to phone anyone.
Editorial verdict on each
PostGrid
PostGrid is the direct mail API you pick when the address list is the problem. The verification and NCOA layer is the best in this category, the compliance coverage opens healthcare and financial work that marketing-first vendors cannot take, and the free Starter plan is a genuinely usable production plan rather than a trial, which makes it one of the cheapest ways for a small business to start mailing programmatically. The weakness is commercial, not technical: there is no published tier between 500 pieces a month and an Enterprise quote, and no published international postage at all, so the platform is easiest to adopt and hardest to grow into. Start here if you are technical, US or Canadian, and mailing something that has to arrive. Look at Lob or Stannp if you want to see your price at 50,000 pieces before you write any code.
Read the full PostGrid profileStannp
Stannp is the most commercially sensible direct mail platform in this category for a business that is not American and not enormous. The pricing ladder is the point: a $12 tier that buys volume rates at 240 letters a month solves the exact problem every US competitor ignores, and pay-as-you-use with no minimum spend or contract means a seasonal sender is never carrying a subscription through quiet months. Multi-country dispatch from the US, UK, and Canada makes it the default for cross-border small businesses. What you give up is developer polish, published postcard rates, any compliance programme, and per-piece delivery proof, so regulated mail, legally significant notices, and engineering-heavy integrations all belong somewhere else. For everyone else running campaigns or operational mail on a real budget, this is the one to start with.
Read the full Stannp profilePostGrid profile last reviewed 2026-08-22; Stannp last reviewed 2026-08-22. Pricing is compiled from public sources and can change without notice. See our methodology.