Nitrosend has opened a second launch wave for its AI-native email platform, positioned around the OpenAI ecosystem under the banner Email for Codex. The platform operates from within an AI agent rather than a separate dashboard, connecting to Codex, ChatGPT, Claude Code, Cowork, Cursor, Gemini CLI, and any MCP-compatible agent. From a single prompt, it builds transactional emails, automated flows, and on-brand newsletters, with human approval gates before anything sends.
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Nitrosend
A user describes a sequence in plain language, such as a post-trial win-back flow with branching logic, and Nitrosend assembles the flow structure, conditional paths, and email designs in one pass. Output arrives as responsive, on-brand markup, and stays editable at the pixel level in native email markup, so a single line can change without re-prompting the agent. Each brand maintains its own brand kit, domains, campaigns, and audience context, which suits agencies and teams managing more than one account. Performance analytics feed back into the connected agent stack, and the company states the engine adjusts subject lines, send timing, and content based on real send data.
The intended audience includes startup founders, early-stage teams, and builders working within the OpenAI ecosystem, as well as growth marketers and email operators transitioning from legacy tools such as Mailchimp, Klaviyo, and ActiveCampaign. The positioning targets a gap left by those tools, where setting up email still pulls a user out of the agent and into a builder interface. On delivery, Nitrosend claims it runs on Amazon SES and Mailgun and reports 99.9 percent deliverability.
Nitrosend is based in Adelaide, South Australia, and is the third company from brothers George and Edward Hartley. The pair previously founded SmartrMail, an email marketing platform acquired by Relay Commerce in 2022, and reported having sent more than 6 billion emails across prior ventures. Nitrosend raised a seed round of around 500,000 US dollars led by Eastend Ventures, with the current wave extending its messaging beyond the Claude ecosystem to Codex and any MCP agent.