--- title: "PostPilot vs LettrLabs for ecommerce and local mail" description: "PostPilot runs managed ecommerce lifecycle mail. LettrLabs adds CRM targeting and weather-triggered sends for local markets." canonical: https://trysincerely.com/compare/postpilot-vs-lettrlabs last_updated: 2026-09-18 --- > 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. # PostPilot vs LettrLabs for ecommerce and local mail > PostPilot runs managed ecommerce lifecycle mail. LettrLabs adds CRM targeting and weather-triggered sends for local markets. Source: https://trysincerely.com/compare/postpilot-vs-lettrlabs Shortlist PostPilot if your Shopify store needs a managed lifecycle mail program where creative, strategy and execution sit inside your ecommerce stack. Shortlist LettrLabs if you also require radius, new-mover or storm-triggered campaigns that reach audiences outside your customer database, or if you want a broader targeting toolkit across CRM and local workflows. ## Where each is the better choice PostPilot is the better fit when you want to plug mail directly into Shopify and Klaviyo without building a separate operating process. Its [positioning](https://www.postpilot.com/) centers on acquisition, retargeting and retention for ecommerce brands, with creative and management services bundled into tiered plans. The dashboard [documents](https://help.postpilot.com/knowledge/using-in-app-dashboard) holdout comparisons, incremental revenue and incremental ROAS, so you can assess campaign economics without assembling experimental infrastructure yourself. LettrLabs is the better fit when your use cases extend beyond Shopify lifecycle events. Its [platform](https://www.lettrlabs.com/) supports radius targeting, new-mover campaigns, Lead Reveal visitor retargeting and [HailTrace storm-triggered sends](https://support.lettrlabs.com/en/articles/13919765-setup-guide-hailtrace-storm-automation) with service-area criteria and manual or automatic execution. The format range [includes](https://www.lettrlabs.com/) folded pieces, robot-written cards and letters in handwritten envelopes, not only postcards. ## Pricing commitments and postage conditions PostPilot Growth Services costs $99 per month or $82.50 with annual billing, with printed 4x6 pieces from $0.68 including postage. Pro Services runs $499 monthly or $419 annual-billed equivalent, with 4x6 at $0.64 or lower by volume, aimed at programs up to roughly 50,000 pieces per month. Enterprise is custom above that threshold. [PostPilot pricing](https://www.postpilot.com/pricing) also documents US and UK A5 options. LettrLabs offers a free Starter platform with per-piece billing: printed 4x6 from $0.76, handwritten postcards from $1.66 and card-plus-envelope from $2.86, postage included. Premium at $399 per month adds native integrations, webhooks, attribution, multi-touch campaigns and MailGPT; confirm billing terms and any minimum spend. Enterprise is custom and includes [holdout and A-B testing](https://www.lettrlabs.com/products/pricing). Lower rates on Premium depend on billing and spend-commitment terms. These are not matched feature comparisons. PostPilot's entry tier includes service packages; LettrLabs lists native integrations under Premium and holdout testing under Enterprise. Do not calculate a break-even from the headline per-piece rates alone. ## What each handles differently | Dimension | PostPilot | LettrLabs | | ----------------------- | -------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Primary model | Managed Shopify lifecycle with creative/strategy services [PostPilot](https://www.postpilot.com/) | Broader ecommerce/CRM/local targeting with tiered campaign tools [LettrLabs](https://www.lettrlabs.com/) | | Shopify/Klaviyo path | Core integrations documented | Segment-based sends, profile filters, monthly limits; [test mode](https://support.lettrlabs.com/en/articles/13920809-setup-guide-klaviyo) available | | Incremental measurement | Dashboard holdout, incremental revenue/ROAS [PostPilot](https://help.postpilot.com/knowledge/using-in-app-dashboard) | Enterprise holdouts; [help warns](https://support.lettrlabs.com/en/articles/15925811-what-does-iroas-mean-and-when-can-i-trust-the-number) thin samples produce unstable estimates | | Creative/format mix | Postcards, handwritten cards, Cardalogs, catalogs [PostPilot](https://www.postpilot.com/) | Postcards, large folded pieces, robot-written cards/postcards, letter combinations [LettrLabs](https://www.lettrlabs.com/) | | Audience expansion | Ecommerce acquisition/retargeting/retention | Plus radius, new-mover, [storm-triggered](https://support.lettrlabs.com/en/articles/13919765-setup-guide-hailtrace-storm-automation) local mail | Sources checked September 17, 2026. ## What is unknown Ask each vendor for production and delivery estimates for your actual destinations. PostPilot publishes a UK A5 option; confirm its terms for your volume and format rather than assuming every format is available in every country. Both vendors offer holdouts. Compare their outcome definitions, plan access and audience-size requirements. PostPilot includes holdout reporting in its dashboard documentation; LettrLabs gates full holdout and A-B testing behind Enterprise and warns that small holdout groups yield unreliable incremental ROAS figures. Ask each vendor to show you a configured holdout for your expected segment size before trusting any projected lift. ## One practical way to evaluate Configure the same lapsed-buyer segment with both vendors: identical suppression rules, resend logic, offer and attribution window. Inspect how each allocates holdouts, calculates incremental revenue and lets you export raw results. Price the creative and management effort required to launch, not just the per-piece rate. Then, and only if you actually need it, add a non-Shopify use case such as a radius or storm-triggered campaign to see how each vendor handles audiences outside your customer file. ## Where Sincerely fits Sincerely serves B2B named-account mail with per-recipient copy grounded in researched account facts, explicit human launch approval and [account-level holdout estimates with confidence intervals](https://trysincerely.com/holdout-testing). We also offer [gifts](https://trysincerely.com/gifts), which require a recurring plan, mail credits and a separate prepaid gift balance. Our handwritten sending capability is not yet open; do not plan immediate handwriting fulfillment through Sincerely. If your need is Shopify lifecycle automation or storm-triggered local campaigns, PostPilot or LettrLabs will likely serve you better. ## Related questions - [Sincerely vs PostPilot](https://trysincerely.com/vs/postpilot): PostPilot is direct mail for Shopify and DTC brands. Sincerely is direct mail for B2B accounts. Here is the honest split, with real pricing for both. - [Sincerely vs LettrLabs](https://trysincerely.com/vs/lettrlabs): LettrLabs sends handwritten-style and printed mail for local businesses. Sincerely runs measured B2B direct mail from your CRM. Here is how to pick. --- 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