Everything the
paid tools
charge for.

Build a sequence once, then let it run across every mailbox you own.

Multi-step sequences

Chain follow-ups with per-step delays and stop them automatically when someone replies.

• — Unlimited steps with independent wait times
• — Auto-stop on reply, bounce or unsubscribe
• — Schedule by weekday, send window and timezone

A/B testing with auto-winner

Run template variants inside a single step and let the campaign pick what works.

• — Multiple variants per sequence step
• — Winner scored 60% on replies, 40% on opens
• — Per-template performance breakdown

Inbox rotation

Spread volume across many senders so no single mailbox carries the load.

• — Round-robin or random rotation
• — Mix Gmail and SMTP inboxes in one campaign
• — Per-inbox daily caps, hard-limited at 50/day

Ramp-up & human pacing

New mailboxes start slow and speed up as they age, with human-like gaps between sends.

• — Tiered daily limits based on mailbox age
• — Randomised intervals, never a fixed cadence
• — Quieter days assigned per inbox each week

The part that decides whether any of the above ever reaches an inbox.

Mailbox warm-up

Real conversations that build sender reputation before you send anything cold.

• — Multi-turn threads with proper reply headers
• — AI-generated replies, not canned templates
• — Automatically rescues mail from the spam folder

Pairing risk scoring

Scores every warm-up pairing so the pattern never looks artificial to a mailbox provider.

• — Weighs repeat pairs, reciprocity and concentration
• — Shadow mode logs decisions before enforcing them
• — Engagement targeted at 30–50%, not a giveaway 100%

DNS automation

SPF, DKIM and DMARC records written straight to your registrar instead of copy-paste.

• — Cloudflare, GoDaddy, Namecheap and Route 53
• — Verification via provider API and direct DNS
• — 0–100 domain health score

Inbox placement testing

Seed sends through real Gmail and Outlook accounts to see where you actually land.

• — Classifies inbox, spam or promotions
• — Per-domain and per-subdomain results
• — Re-checks on a schedule as reputation shifts

Bring your own API keys — you control the model and the spend.

AI writing & personalization

Per-recipient copy generated at send time, not merge tags in a template.

• — OpenAI, Anthropic, Gemini, DeepSeek, Grok or Groq
• — Spintax with nested variants and variables
• — Optional web enrichment personalises from live search

AI Campaign Studio

Describe the campaign in chat and it builds the templates, list and schedule for you.

• — Creates templates, picks lists and inboxes
• — Launches campaigns straight from the conversation
• — Runs spam-word checks before you send

Smart Leads discovery

Turn a description of your buyer into a verified, ready-to-send contact list.

• — Search, scrape and extract companies and people
• — Email pattern guessing with live validation
• — Runs async so you can close the tab

Risky contact blocking

Bad addresses are removed before they can damage your sender reputation.

• — Bulk verification removes undeliverables
• — Auto-blocks after repeated non-engagement
• — Manual block and unblock overrides

Everything that happens after the send.

Unified inbox

Every reply across every connected mailbox, in one thread view.

• — Gmail API, IMAP and inbound webhook capture
• — Rich-text replies with AI drafting
• — Classifies human replies from auto-responders

Workflow automation

A visual canvas for anything the sequence builder can't express.

• — Triggers on send, open, reply or a schedule
• — Conditions, waits, list changes and campaign control
• — Full run history with per-step status

Analytics & tracking

Opens, clicks and replies, sliced by campaign, inbox and hour of day.

• — Open pixels and click tracking on your own domain
• — Best-send-time and sending-behaviour insight
• — Per-campaign and per-template comparison

Templates & builder

Write in plain text, HTML or a drag-and-drop editor — whatever suits the campaign.

• — Visual builder with CSS inlining
• — 38 ready-made designs in the library
• — Reusable variables and personalisation tokens

It's your infrastructure and your data.

Self-hostable

Run the whole stack yourself with one Docker command. No per-seat pricing, no send limits.

• — MIT licensed, the full source is public
• — Docker Compose for the entire stack
• — Terraform and Caddy configs included

Connect any mailbox

Gmail and Outlook over OAuth, or any provider over SMTP and IMAP.

• — Ten SMTP presets, plus fully custom
• — App-password auth where OAuth isn't wanted
• — Credentials encrypted at rest with Fernet

Security & compliance

Two-factor auth, revocable sessions and one-click unsubscribe handling.

• — 2FA on by default, sessions individually revocable
• — Unsubscribe and suppression handled automatically
• — Team seats with page-level permissions

Custom tracking domains

Serve pixels and links from your own subdomain instead of a shared one.

• — Branded click and open URLs
• — Automatic certificate issuance
• — Verified before any traffic is routed