Outbound sales teams
Give operators one place to prepare campaigns, distribute sending, monitor health, and manage replies.
- Rotate sending across connected inboxes
- Control warmup, volume, and sender health
- Assign and answer replies in one inbox
API-first cold email
The affordable Instantly & Smartlead alternative.
Run email sequences, inbox rotation, warmup, verification, replies, and deliverability controls in one focused platform. Automate your outbound workflow through MCP and the API on every plan.
See how to use email sequences in your outbound workflow →
Works exclusively with Plans from $29/month API & MCP on every plan
A focused alternative to
Instantly
Smartlead
QuickMail
Saleshandy
Woodpecker
Emailchaser
Instantly
Smartlead
QuickMail
Saleshandy
Woodpecker
Emailchaser
MailSequence brings business email campaigns, sender controls, and reply management together. Run verification, warmup, client workspaces, and API automation from one focused platform.
Capabilities
The email campaign workflow in one focused product.
Campaign builder
Create email sequences with steps, delays, reusable templates, personalization, and automatic stop-on-reply.
Sending pool
Rotate connected inboxes across a campaign while keeping daily volume controlled per inbox and per domain.
Warmup engine
Ramp inbox activity gradually before asking a new mailbox to carry serious outbound volume.
Unified inbox
Review replies across connected inboxes without jumping between accounts. Tag, assign, and answer in one place.
AI campaign help
Use the AI credits included in your plan for generation, personalization, rewrites, and reply assistance, with human review before the work goes live.
Verification and analytics
Verify contacts, suppress hard bounces, and track sends, replies, bounces, unsubscribes, warmup, inbox health, and domain health.
Who MailSequence is for
A focused platform for serious outbound teams.
Bring your domains and prospect data. MailSequence gives your team the sending workflow, controls, and reply operation.
Founder-led sales
Build a repeatable outbound motion with a small team and clear control over infrastructure costs.
- Start with a focused sending pool
- Keep inbox and domain costs visible
- Automate through MCP and the API
Lead generation agencies
Run multiple client campaigns with separate workspaces, shared operating controls, and centralized replies.
- Separate workspace for every client
- Centralized reply handling for the team
- Repeatable onboarding through the API
Teams switching platforms
Evaluate a focused alternative for business email campaigns, sender controls, and reply management.
- Review source compatibility before moving
- Transfer one supported campaign first
- Confirm suppression records before scaling
How it works
From existing inboxes to managed replies, in six clear steps.
Keep the rest of your sales stack. Use a focused workflow your team can learn quickly.
Connect or provision inboxes
Connect supported inboxes you own, or use the provisioned-inbox allowance included with your plan.
Prepare domains and warmup
Coordinate Cloudflare-based domain setup, verify authentication records before sending, ramp volume gradually, and monitor health.
Build or transfer campaigns
Create step-based sequences or begin a staged Instantly or Smartlead migration with a source-compatibility check.
Rotate sending safely
Spread volume across a campaign sending pool with per-inbox limits.
Manage replies centrally
Track threads, assign conversations, tag replies, and stop follow-ups automatically.
Watch performance
Monitor sends, replies, bounces, unsubscribes, warmup, inbox health, and domain health.
Deliverability
Built exclusively for Google Workspace and Microsoft 365 email.
MailSequence connects Google Workspace and Microsoft 365 business inboxes, including compatible preconfigured inboxes purchased through MailSequence. Free Gmail, Outlook.com, and other SMTP providers are not supported.
- Guided SPF, DKIM, and DMARC setup
- OAuth synchronization with SMTP readiness checks
- Built-in contact verification
- Warmup ramp and sending caps
Your domains, list quality, message, volume, and recipient behavior affect delivery. MailSequence gives you controls, visibility, and guidance to maintain high delivery rates.
Explore business inboxes → See domain setup → See email verification →
Provider matrix
Google Workspace✓ OAuth sync, SMTP sending
Microsoft 365✓ OAuth sync, SMTP sending
Free Gmail / Outlook✕ Not supported
Disposable SMTP✕ Not supported
Preconfigured business inboxes✓ Purchase and connect in app
Migration
Switching from Instantly or Smartlead? One-click import.
Connect your Instantly or Smartlead API key to see what MailSequence can import. Review the available campaigns, sequence content, leads, and block-list records, then transfer one supported campaign before moving more.
Migration checklist
[x] Source API key connected[x] Source compatibility checked
[x] Transfer scope documented
[x] Suppression records confirmed
[x] Sending limits documented
[x] Business inboxes connected
[x] Warmup enabled
[ ] Launch small, then scale
Developer platform
API and MCP, on every plan.
Use the REST API to connect software and the hosted MCP server to connect AI agents. Both work with MailSequence contacts, sequences, campaigns, inboxes, replies, analytics, and imports under scoped permissions.
- Public OpenAPI 3.1 documentation
- Scoped keys, cursor pagination, and idempotent writes
- HMAC-signed webhooks with retries
- Hosted MCP server for agent workflows
Automation surfaceEvery plan
REST APIVersioned /api/v1
OpenAPIGenerated 3.1 reference
WebhooksHMAC signed + retried
MCP serverHosted HTTP JSON-RPC
AuthenticationScoped API keys
AI credits
AI credits included in every plan.
Use credits for sequence generation, first-line personalization, copy rewrites, automatic reply tagging, and response drafts.
AI enhances your workflow rather than becoming a dependency. Most features continue to work without it, using non-AI fallbacks where available.
Typical credits per action
Generate a sequence10 credits
Personalize one first line1 credit
Rewrite one step1 credit
Automatically tag one reply1 credit
Generate reply suggestions4 credits
Indicative costs based on current application defaults. AI output should be reviewed before use.
For lead-generation agencies
Run client campaigns in separate workspaces.
Give every client an isolated workspace, manage organization-level connections once, and turn repeatable onboarding into an API call.
- Client workspaces with clear campaign separation
- Role-based team access and centralized replies
- Sending, reply, bounce, warmup, inbox, and domain visibility
- Provisioning API for repeatable client onboarding
Scale planFor agencies
Connected inboxes50
Sending domains50
Client workspaces10
Team members15
Monthly price$299
Pricing
Simple pricing for serious outbound teams.
The plan price includes the product and a defined provisioned-inbox allowance. We are passing that mailbox cost through without markup at launch to give early customers the lowest possible total cost. Additional inboxes cost extra.
Starter
Solo operators getting set up properly
$29/mo
Choose Starter- Up to 5 business inboxes included
- 2 sending domains
- 1 workspace
- 1,000 contacts
Most popular
Growth
Active outbound teams running multiple campaigns
$99/mo
Choose Growth- Up to 10 business inboxes included
- 10 sending domains
- 3 workspaces
- 10,000 contacts
Scale
Agencies and client operators
$299/mo
Choose Scale- Up to 50 business inboxes included
- 50 sending domains
- 10 client workspaces
- 50,000 contacts
Enterprise
Larger outbound teams replacing expensive setups
$999/mo
Choose Enterprise- Up to 200 business inboxes included
- 200 sending domains
- Custom workspace limits
- 250,000 contacts
✓ Included in every plan
Provisioned business inboxes · Public API · Hosted MCP · Monthly AI credits · Google & Microsoft inbox connection · Inbox rotation · Warmup · Verification · Unified inbox · Suppression handling
Compliance controls
Built-in controls for responsible email campaigns.
Support CAN-SPAM, GDPR and PECR, and CASL workflows with authenticated business inboxes, sender identity, audience-source requirements, opt-out handling, suppression, and abuse review.
Lawful audience data
Use relevant business contacts obtained lawfully and retain the source, permission, or lawful-basis evidence required for each market.
Clear sender identity
Use authenticated business inboxes, accurate sender details, and the business contact information required in commercial messages.
Opt-out and suppression
Provide a working opt-out method. Unsubscribes, complaints, hard bounces, manual blocks, and imported suppressions are checked before sending.
Active abuse enforcement
We review risky sending, pause campaigns, request sourcing evidence, and suspend or terminate accounts that violate our policy.
Review compliance and anti-abuse controls → Explore deliverability controls →
FAQ
Frequently asked questions
What does MailSequence bring together?
MailSequence covers the core cold-email workflow: business inboxes, campaigns, sending pools, warmup, verification, AI assistance, reply handling, suppression, analytics, and automation through its API, webhooks, and MCP server.
How does MailSequence fit into my sales stack?
Keep using the data, CRM, and sales tools that work for your team. MailSequence provides the campaign sending, reply management, deliverability controls, and automation layer, with plans starting at $29 per month.
Do you provide inboxes or domains?
Yes. Your plan includes a defined allowance of provisioned business inboxes, with no markup on that allowance at launch. You can also connect supported inboxes you already own. Additional inboxes, sending domains, and customer-owned provider subscriptions cost extra.
Why focus on business inboxes?
MailSequence uses authenticated business mailboxes, documented setup, and conservative controls. Google Workspace and Microsoft 365 use OAuth for mailbox synchronization and separately verified SMTP credentials for sending. You can also purchase and connect preconfigured business inboxes inside MailSequence.
Does MailSequence guarantee inbox placement?
No platform can guarantee inbox placement. MailSequence provides warmup, rotation, limits, monitoring, and early risk controls, while your domains, list quality, copy, volume, and recipient behavior still affect delivery.
Can I use free Gmail accounts?
No. MailSequence is built for real business inboxes on owned domains.
Is there a free trial?
MailSequence starts with a paid plan. A useful evaluation requires your domains, business inboxes, DNS, sending limits, lead list, and a real campaign.
How does the one-campaign migration work?
Use an authorized Smartlead or Instantly API key for a read-only compatibility check. Confirm the records available, transfer only the supported scope, reconnect inboxes, and verify suppressions. Keep the source campaign running until the MailSequence campaign is ready, then launch conservatively.
What happens when AI fails?
AI is best-effort and non-blocking. Core sending and workflow operations continue even if an AI provider is unavailable.
Replace the cost, keep the workflow.
Connect Google Workspace or Microsoft 365 inboxes, create a campaign, and launch with warmup and safe limits.