Heysender Due Diligence

Run due diligence on Heysender: check compliance and get alerts when suppliers or ownership change.

Denmark · owned by Arnsbo Group Holding ApS (Denmark) · heysender.dk · 24 vendors

Heysender provides a European and GDPR-compliant transactional email service designed to ensure high deliverability rates and offer detailed logging, tracking, and delivery control. The platform aims to simplify the management of transactional emails, making it accessible for customer support and marketing teams, rather than solely developers. It is part of Hey Group, which offers various email-related software solutions.

Resilience scores

Technology vendors

Services catalogue

2 services in catalogue across 2 categories; runs on 24 sub-vendors.

Insights

Last updated 2026-09-13

24 direct vendors, 248 subvendors

Direct vendors by controlling owner country (sample)

Subvendors by controlling owner country (sample)

Compliance

4 in-scope frameworks identified; showing 3.

ISO 27001 (source) — No public evidence

Evidence: https://heysender.com/isae-3000/

ISAE 3000 (source) — Evidence found

Evidence: https://heysender.com/isae-3000/, https://heysender.com/uafhaengig_revisors_isae_3000_erklaering_om_persondata_-_2025/

SOC 2 (source) — No public evidence

Evidence: https://heysender.com/isae-3000/

Financials

Three-year financials

Financial Resilience Score: 6/10

Heysender ApS operates a volume-tiered monthly subscription SaaS model centred on transactional email delivery, which inherently generates highly predictable, recurring revenue (MRR) with strong customer lock-in due to deep API and SMTP integration into production systems. Once embedded in a customer's technical stack, switching costs are high, supporting low churn and stable cash flows. The company's GDPR/EU data residency positioning and ISAE 3000 certification provide a durable structural moat against US-based incumbents, particularly as European data sovereignty regulations tighten. Named enterprise clients such as Visma IMS and RealDania By & Byg indicate the company has achieved meaningful commercial traction beyond early-stage. However, the company is very small at approximately 11 employees, creating significant key-person risk and limiting capacity for rapid scaling or competitive response. No audited financial data is publicly accessible, making it impossible to verify revenue scale, profitability, or balance sheet strength. The pricing structure — topping out at DKK 2,400/month for 400,000 emails before custom tiers — implies annual revenues likely in the low-to-mid millions of DKK range at current scale, which is modest in absolute terms. The competitive landscape is dominated by well-capitalised global players (Twilio SendGrid, Mailgun/Sinch, AWS SES, Postmark), and Heysender competes primarily on compliance and local support rather than price or feature breadth. Single-product concentration means any disruption has outsized impact. No evidence of external funding (VC or PE) suggests a bootstrapped or group-funded trajectory, which constrains investment capacity for growth. Geographic concentration in Denmark and the Nordic region further limits the total addressable market unless broader EU expansion is successfully executed.

Key strengths: Volume-tiered monthly subscription model generates highly predictable, recurring revenue (MRR), Deep API/SMTP integration creates high switching costs and strong customer lock-in, GDPR/EU data residency and ISAE 3000 certification provide durable regulatory moat vs. US incumbents, Group synergies within Hey Group (Heyloyalty, Ubivox) enable cross-selling and shared infrastructure, Named enterprise clients (Visma IMS, RealDania By & Byg, PWT Group) confirm mid-market and enterprise traction, 20+ years of founding team domain expertise in email infrastructure

Risk factors: Very small headcount (~11 employees) creates key-person risk and limits scaling capacity, No publicly accessible audited financial data — revenue, profitability, and balance sheet unverifiable, Intense competition from well-capitalised global incumbents (Twilio SendGrid, Mailgun/Sinch, AWS SES, Postmark), Single-product concentration — all revenue from one product category, Geographic concentration in Denmark/Nordic region limits total addressable market, No evidence of external venture capital or private equity funding, constraining growth investment capacity, Pricing ceiling of DKK 2,400/month for standard tiers implies modest absolute revenue at current scale, Infrastructure dependency on upstream IP reputation, DNS, and data centre providers creates operational risk

Revenue by geography

Revenue by product/service

Workforce by country

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