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Digital Marketing Company

Bossar

Email and SMS marketing agency running retention campaigns for ecommerce brands on Klaviyo

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TrustList summary

Bossar is a retention marketing agency that manages email and SMS programmes for online stores. It takes on the full workload, from automated flows to one-off campaigns, with the aim of turning a store's existing customer list into repeat sales without extra ad spend.

Products and services

  • Email and SMS management: a fully managed service covering strategy, build and sending.
  • Behaviour-based flows: messages triggered by where a customer is in the buying process.
  • Campaigns: targeted sends meant to sell, inform and build loyalty.
  • Email design system: consistent templates matching the store's brand look and voice.
  • Deliverability and segmentation: list segmentation and practices to keep emails out of spam and promotions folders.

Who it serves

Bossar works with ecommerce brands, including single-product stores, and case studies mention a shoe retailer in the Netherlands, a home decor store in the US and an automotive brand. It has served more than 100 ecommerce brands.

Key facts

  • Platforms: works on Klaviyo, with Shopify stores and tools such as Postscript
  • Commitment: no minimum contract period
  • Model: performance-based arrangement

Summary written by TrustList from the business's own published information, Sep 2026.

Categories & features

Rankings

Bossar is ranked on 1 TrustList ranking at #48.

Every ranking orders its listings by their reviews, how complete the profile is and the Trust Score. Bossar has no reviews yet and 3 of the 10 profile details we look for. Where no listing on a page has been reviewed, the order follows the profiles alone.

Digital marketing company · 1 ranking

  • #48of 611
    Sales

    It is the only one of the top 92 here listing shipping and one of 3 here listing security.

    Its profile: “It takes on the full workload, from automated flows to one-off campaigns, with the aim of turning a store's existing customer list into repeat sales without extra ad spend.”

    Of the top 92 here, 38 also cover SEO and 34 also cover creative; 2 also work in Nice.

    Behind Bootcamp Media, ahead of Bounty Hunter Agency.

As of 2026-11-01. Organic ranks only; sponsored placements are never ranks. How TrustList ranks

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