What's new.

We ship fast. This page is the source of truth for everything we've shipped, in reverse chronological order. If you want major releases in your inbox, subscribe here.

v1.1.0 - June 2026

This release makes audience work faster and safer: Mailchimp migration, a stronger segment builder, better contact visibility, and clearer progress for long-running jobs.

• Mailchimp audience import - Connect Mailchimp with OAuth, import audiences and members into Nitrosend lists and contacts, preserve merge-field/source metadata, and keep consent conservative: only Mailchimp subscribed members become email-subscribed in Nitrosend.
• New segment and filter builder - Contacts, segments, saved views, flow split conditions, and activity filters now share one filter system. Build audiences from profile fields, custom fields, list membership, tags, engagement, deliverability, and event history without each screen behaving differently.
• Better saved views and segment counts - Save contact-table views for operational work, turn durable audience rules into segments, and see refreshed segment counts before you send.
• Contact activity drawer - Review a contact's sends, opens, clicks, unsubscribes, bounces, complaints, list changes, and custom events in one timeline before targeting them again.
• Live progress everywhere it matters - CSV imports and integration syncs now report progress through the same real-time progress tray, with clearer stages and status.
• Sending activity and view in browser - The sending log is easier to inspect across campaigns, flows, transactional messages, and tests, and sent emails can expose a stable browser snapshot of what went out.
• Flow and delivery safety polish - Flow send failures are quieter for per-recipient suppressions, test sends use the shared delivery path, and recipient filtering is stricter before delivery.
• In-app AI chat quality - The app chat now routes to a stronger model for higher-quality product help and email work.

v1.0.0 - June 2026

Nitrosend left beta on 1 June, the biggest month we've shipped. Multi-brand landed for agencies, the analytics got a lot deeper, and sent emails now match what you build in the editor.

• Out of beta - Nitrosend is generally available. Same usage-based model: unlimited contacts, no dashboard required.
• Multi-brand for agencies - Run up to five brands on Ultra (unlimited on Enterprise) from one login and one agent connection, with a cross-brand dashboard and a per-client Brand Kit (colours, fonts, logo, voice, and AI memory) your agent uses automatically.
• Live in Codex - The official Nitrosend integration for OpenAI's Codex CLI. One line of remote MCP and your email stack sits right next to your code, so the agent that ships your features can wire the emails that go with them.
• Deeper analytics, with an AI insight - The Activity dashboard now lays out sends, opens, clicks, and engagement (opens de-duplicated and counting Gmail and Yahoo proxy opens), and your weekly digest carries an Opus-written insight with a recommended next step.
• Live engagement scoring - Every contact is automatically scored into tiers (engaged, warm, cooling, dormant, never) with five ready-made segments: Champions, Loyal, At-Risk, Dormant, and New. Available in the grid, in segments, and to your agent.
• Customizable contacts grid & 90MB imports - The contacts table is now a configurable grid with a field catalog, column manager, and saved views you can turn into segments. CSV imports jump from 10MB to 90MB (500K+ rows) with a destination list up front and a live progress tray.
• Exclude lists & segments on send - Hold back warmup and suppression lists by excluding any list or segment from a campaign's recipients, applied across every send path including your AI agent.
• Flow template library - Start automations from a gallery of 17 starter flows (password reset, shipping notification, back-in-stock, and more) instead of a blank canvas.
• Raw HTML transactional - Send fully custom HTML transactional email by passing an html field to POST /v1/my/messages, delivered verbatim, and preview exactly how any message was composed from the Activity log.
• Email that renders as designed - Sent emails now match the editor canvas across every section: colours, padding, spacing, alignment, and 2x retina images all survive the trip to the inbox.
• Inbox placement & smarter auto-pause - Removed a broken DKIM signature that was pushing managed-domain mail to spam, fixed tracked links carrying query parameters, and taught flow auto-pause to wait for a real volume of bounces (with soft-bounce suppression and email-typo correction).
• Updated pricing - Ultra now includes 125,000 emails per month and up to five brands, the Free plan gives 8,000 emails to start then 500 per month, dedicated sending IPs are a $50/IP/month add-on, and new Enterprise tiers scale to 10M per month.

v0.4.0 - May 2026

The last beta release before we went GA in June.

• Team accounts - Invite teammates and switch between every account you belong to from one login. Invites work from an email invite, signup, password reset, or OAuth.
• HubSpot CRM sync - Connect HubSpot with one-click OAuth to import your contacts and lists. New and deleted HubSpot contacts then sync over automatically via webhooks.
• In the ChatGPT App Store - Nitrosend is now an official ChatGPT app. Search for it, connect once, and sign in. No API key or developer mode.
• One-click domain setup - Verify your sending domain through a guided Entri flow that writes the DNS for you, with live verification status and the manual DNS wizard still there as a fallback.
• Honest domain verification - Domains show green only when SES will genuinely accept your mail and tracking domains only when HTTPS is actually working, with stuck DKIM domains now verifying correctly.
• Per-user digests - Automatic daily, weekly, and monthly digests summarise new subscribers, sends, and deliverability, delivered to your inbox at 9am local time.
• Send-to-all safety rails - Sending to your whole list now takes an explicit All Contacts audience and a confirmation step (including over MCP), so you can't blast everyone by accident.
• Agent-first onboarding - Setup opens straight on the agent-connection step with a copy-paste prompt, and a new public signup endpoint lets you collect contacts from your own site.
• Plus - Resilient per-contact flows (one bad address no longer stalls a flow), attach an existing Mailgun domain, reliable Twilio SMS status, and a {{ contact.website }} merge tag.

v0.3.0 - April 2026

Public API stability pass and the first cohort of shared MCP improvements.

• OpenAPI 3.1 spec - Full public REST API documented at api.nitrosend.com/openapi.yaml.
• Node SDK v0.1.0 - @nitrosend/sdk published on npm. Strongly typed client for all public endpoints.
• MCP tool: nitro_get_insights - Delivery insights, open and click rates, and per-campaign analytics exposed to agents.
• Brand Kit auto-scraping - Point Nitrosend at a URL and it extracts colours, fonts, and logo in a single MCP tool call.
• Unlimited contacts - Every plan now includes unlimited contacts. You only pay for sends and compute.

v0.2.0 - March 2026

Nitrosend is live and onboarding the first wave of users who want to experience AI-native email marketing.

• MCP server - Connect Nitrosend to Claude Code, ChatGPT, Cursor, Codex, Gemini, Windsurf, VS Code, and Zed via MCP. Full campaign lifecycle from your AI agent.
• REST API - Complete API for contacts, campaigns, templates, segments, and sending. Full docs at docs.nitrosend.com.
• AI email composition - AI-powered copywriting and design. Component-based email format that renders to pixel-perfect HTML.
• BYO mode - Use your own infrastructure (AWS SES, Resend, Postmark, Mailgun, SendGrid) and AI keys while Nitrosend powers campaign composition.
• Campaigns & automations - Send one-off campaigns or build multi-step automation flows. Segment your audience with flexible rules.
• Deliverability - SPF, DKIM, DMARC, and custom domain verification. Domain warmup guidance baked in.

v0.1.0 - February 2026

The first version of Nitrosend, running with a handful of design partners while we tested the MCP-first architecture.

• MCP-first architecture - Every capability exposed as an MCP tool and REST endpoint from day one. No dashboard-first design.
• Component model - Email template format designed for AI composition. Structured JSON that renders to MJML and then HTML.
• Email Marketing Skill launched - emailmarketingskill.com. 55,000 words, 908 sources, 19 industry playbooks. Available as a Claude skill.
• Brand Kit memory - Accounts remember brand context across every agent session. No re-prompting design details.

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