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InboxPlan
San Francisco, California, United States
What it is
InboxPlan is a web service for automated email warm-up, scheduling, and deliverability monitoring. Its AI creates industry-tailored warm-up messages and simulated two-way business conversations, generating engagement signals for connected accounts. Sending windows are randomized and volume ramps automatically, typically from 3–5 emails per day in week one to 30–50 per day by week four; manual limits can be set for each account. A live monitor tracks sender score, inbox placement, and spam rates across major providers. Users can connect Gmail, Outlook, Zoho, or custom SMTP accounts, with OAuth authentication and no stored passwords according to the service. Multiple accounts can run in one workspace, each with separate threads, schedules, and reputation dashboards, subject to plan allowance. InboxPlan cites a private network of 500+ verified seed inboxes and setup under two minutes. It is aimed at sales teams, agencies, startups, and businesses in SaaS, recruiting, real estate, finance, and e-commerce. The paid service offers a 7-day free trial requiring a credit card.
For and against
For
- AI creates industry-tailored warm-up conversations
- Live monitor tracks sender, inbox, and spam metrics
- Connects Gmail, Outlook, Zoho, and custom SMTP
- Supports multiple accounts with separate dashboards
- OAuth is used without storing passwords
Against
- No free plan is offered
- Seven-day trial requires a credit card
- Account counts depend on plan allowance
The verdict
InboxPlan combines automated warm-up activity with scheduling controls and live deliverability metrics. Its multi-account workspace and supported mailbox connections fit teams managing several senders, but the service is paid after a short trial.
Who it suits
It suits sales teams, agencies, startups, and businesses managing outbound email accounts. Organisations wanting automated warm-up, mailbox controls, and deliverability monitoring may find it useful.
On the record
- Account security
- InboxPlan says it uses standard OAuth and does not store users' passwords.inboxplan.com · read 3 Oct 2026
- AI conversations
- Its AI generates unique, human-like business conversations for warm-up threads.inboxplan.com · read 4 Oct 2026
- AI warm-up
- Its AI generates unique warm-up emails and coherent conversation threads tailored to the user's industry.inboxplan.com · read 3 Oct 2026
- Authentication
- InboxPlan says it uses OAuth and does not store users’ passwords.inboxplan.com · read 4 Oct 2026
- Deliverability monitoring
- A live health monitor tracks sender score, inbox placement, and spam rates across major providers.inboxplan.com · read 3 Oct 2026
- Health monitoring
- The live health monitor tracks sender score, inbox placement, and spam rates across major providers.inboxplan.com · read 4 Oct 2026
- Integrations
- The site says users can connect Gmail, Outlook, Zoho, or custom SMTP accounts.inboxplan.com · read 3 Oct 2026
- Intended users
- The homepage names sales teams, agencies, and startups, and lists SaaS, recruiting, real estate, finance, and e-commerce businesses among its audiences.inboxplan.com · read 3 Oct 2026
- Multi-account support
- Users can connect multiple accounts, with each account getting its own warm-up threads, send schedule, and reputation dashboard, subject to the plan.inboxplan.com · read 3 Oct 2026
- Multiple accounts
- The site says users can warm multiple accounts in one workspace, subject to their plan’s account allowance.inboxplan.com · read 4 Oct 2026
- Purpose
- InboxPlan provides automated email warm-up, smart scheduling, and deliverability analytics to help emails reach the inbox.inboxplan.com · read 4 Oct 2026
- Reply simulation
- InboxPlan simulates two-way AI conversations to create engagement signals.inboxplan.com · read 4 Oct 2026
- Scheduling
- Smart scheduling randomizes send windows and ramps volume automatically.inboxplan.com · read 4 Oct 2026
- Seed network
- InboxPlan says its private seed network includes 500+ verified inboxes across major email providers.inboxplan.com · read 4 Oct 2026
- Sending limits
- Warm-up typically starts at 3–5 emails per day in week one and scales to 30–50 per day by week four, with manual per-account limits available.inboxplan.com · read 4 Oct 2026
- Setup
- InboxPlan says setup takes under two minutes.inboxplan.com · read 4 Oct 2026
- Supported connections
- The site says users can connect Gmail, Outlook, Zoho, or custom SMTP accounts.inboxplan.com · read 4 Oct 2026
- Trial
- The homepage advertises a 7-day free trial and says a credit card is required.inboxplan.com · read 4 Oct 2026
