Helo

Helo is an email delivery service offering an email API and SMTP for sending email, positioned as "an email API that actually delivers." It is built for developers and for platforms that send email on behalf of their own customers. The core purpose is simple and stated plainly: Helo obsesses over getting your emails to the inbox so you don't have to. It is created by a team of self-described email nerds with years of experience in the industry, who describe themselves as intentionally lean, independent by conviction, and focused on one thing: building a modern email API you'll genuinely enjoy using, and that is affordable too. Email delivery is framed as the product's central concern rather than a side feature of a larger platform. On the surface, sending email looks simple: you send an email and the recipient receives it. Helo's own framing is that the deeper you dig, the more you realize it is a complicated thing to do well, and most people didn't get into building products to think about email. Helo positions itself against an industry it describes as full of giant corporations chasing revenue targets and startups eyeing their exit strategy, where being a customer isn't always fun. The company states that it is independent, has no investors, holds no board meetings, and has no outside influences other than what its customers want. It explicitly rejects growth-at-all-costs playbooks in favor of a product people love and a sustainable company built to last. The first stated reason to choose Helo is deliverability. Deliverability is described as the number one priority, and the team says it does everything it can to ensure emails reach inboxes as fast as possible. For anyone whose product depends on messages arriving — password resets, receipts, notifications, or marketing sends — inbox placement is the difference between a working workflow and a broken one, so Helo treats reliable, fast inbox reach as the foundation of the service rather than one feature among many. The second stated reason is speed of integration. Whether you call the powerful API or send with SMTP, Helo says you will be up and running in no time, and the product includes SDKs in popular languages. This matters because switching or adding an email provider usually means touching authentication, message construction, and error handling in application code. By offering both REST API and SMTP paths plus SDKs, Helo aims to let developers integrate email sending in minutes rather than weeks. The third stated reason is isolation for optimized deliverability. Helo's example is direct: your password reset email shouldn't suffer because you just sent a newsletter. Helo makes separation of transactional and promotional email a piece of cake, and multi-tenant environments are fully supported. In practice this means different categories of mail don't share a single reputation context, and tenants can be kept apart from one another, protecting the important, time-sensitive messages from the consequences of high-volume sends. Helo also addresses a specific and harder case: platforms that send email on behalf of their users. The company notes that when you run such a platform, email sending gets a whole lot more complicated, because one spammy customer can tank your sender reputation — you fix it, and another problem appears. Helo is built to keep that "email sending hydra" from growing back. It provides fully isolated email sending for each of your customers, catches spammers before they can ruin your sender reputation, and makes it easy for your customers to send email using their own domains. The platform documentation is available for sending for platforms. On the fundamentals, Helo covers what a developer-facing email service is expected to cover. It offers a REST API and SMTP, SDKs in popular languages, and separate transactional and broadcast infrastructure. For platforms, it keeps stats, unsubscribes, and credentials separate per tenant, which supports clean reporting and correct handling of preferences and access for each customer. Pricing is usage-based and starts at just $0.00035 per email with all features included. The pricing philosophy is stated as a benefit in itself: you pay for what you use, you don't pay for the things you don't use, and that's it — with outstanding support always included. Because all features are included under usage-based pricing, users are not pushed into higher tiers to unlock capabilities, which is a meaningful contrast with the tiered plans common in the email space. The primary benefit Helo claims for users is inbox delivery that is fast and reliable, achieved through a deliverability-first approach, isolation of sending streams, and multi-tenant support. A second benefit is fast time to value: with an API, SMTP, and SDKs, you can integrate sending in minutes. A third benefit is protection of sender reputation, so that bad senders are contained before they drag down deliverability and one customer's behavior doesn't damage the platform as a whole. A fourth benefit is cost predictability and fairness — you pay only for what you use, at a per-email rate starting at $0.00035, with all features and outstanding support included. Concrete scenarios follow directly from the described capabilities. A developer needs to send a password reset email and does not want it to suffer because a newsletter was just sent, so transactional and promotional sending are separated. A platform wants each of its customers to send email using their own domains, with fully isolated sending per customer. A multi-tenant product needs stats, unsubscribes, and credentials kept separate per tenant so each customer's activity and preferences are handled independently. A team wants to send a broadcast while keeping transactional infrastructure distinct. And a developer who wants to get started quickly can call the API or use SMTP with SDKs in popular languages. The target users are developers and platforms that send email on behalf of their customers, along with teams that care about deliverability and affordable, fair pricing. The technical surface includes a REST API, SMTP, and SDKs in popular languages, via a web application at app.helohq.com with documentation at docs.helohq.com. Pricing is usage-based and starts at $0.00035 per email, with all features included and no payment for what you don't use. Helo is presented as independent, with no investors or board meetings. Taken together, Helo's value proposition is an email API and SMTP service that treats inbox delivery as the product. It combines deliverability focus, fast integration through API, SMTP, and SDKs, isolated sending for transactional and promotional mail and for multi-tenant platforms, and usage-based pricing starting at $0.00035 per email with all features included. For developers and platforms that send on behalf of their customers, that combination is the reason Helo says it is an email API that actually delivers.