InboxPlan

Free trial Web

What InboxPlan is

InboxPlan is a paid web service for automated email warm-up, sending schedules, and deliverability analytics. Its AI creates industry-tailored warm-up emails and simulated two-way business conversations to generate engagement signals. Sending windows are randomized, volume ramps automatically, and each account can have manual limits. InboxPlan says warm-up commonly starts at 3–5 emails per day in the first week and grows to 30–50 per day by the fourth week. A live health monitor follows sender score, inbox placement, and spam rates across major providers. The service connects Gmail, Outlook, Zoho, and custom SMTP accounts, using OAuth and not storing account passwords. Multiple accounts can share one workspace, with separate warm-up threads, schedules, and reputation dashboards for each account, subject to the plan’s account allowance. InboxPlan names sales teams, agencies, startups, and businesses in SaaS, recruiting, real estate, finance, and e-commerce as audiences. The company was founded in 2022 and is based in San Francisco. A seven-day free trial is available, and starting it requires a credit card. Setup is described as taking under two minutes.

Who it suits

InboxPlan suits sales teams, agencies, and startups that need automated mailbox warm-up and deliverability visibility. It also targets SaaS, recruiting, real-estate, finance, and e-commerce businesses managing one or more sending accounts.

What it does well

AI-tailored warm-up emails and conversation threads
Live sender, inbox, and spam monitoring
Connects Gmail, Outlook, Zoho, and custom SMTP
Randomized scheduling with automatic volume increases
Manual sending limits for each account
Separate dashboards and schedules for multiple accounts

What to know first

No free plan is offered
The seven-day trial requires a credit card
Multiple-account capacity depends on the selected plan
Warm-up volume follows a gradual ramp

Limits

The service has no free plan. Trial access lasts seven days, and multiple-account use is subject to the plan’s account allowance; warm-up volume typically rises from 3–5 daily emails in week one to 30–50 by week four.

Getting started

Open the InboxPlan website
Start the seven-day trial with a credit card
Connect Gmail, Outlook, Zoho, or a custom SMTP account
Authorize the connection through OAuth
Set any manual sending limit for each account
Review warm-up threads, schedules, and reputation dashboards

Verdict

Pick InboxPlan when you want automated warm-up, simulated engagement, and live deliverability monitoring in a web workspace. Its account-by-account controls and supported mailbox connections fit teams managing several senders. Look elsewhere if you need a free plan or do not want to provide a credit card for a trial.

Questions

How much does InboxPlan cost?

InboxPlan is a paid service. It offers a seven-day free trial, and a credit card is required to start it.

Which email accounts can connect?

Users can connect Gmail, Outlook, Zoho, or custom SMTP accounts.

Does InboxPlan store mailbox passwords?

InboxPlan says it uses standard OAuth and does not store users’ passwords.

Can I warm multiple accounts?

Yes. Multiple accounts can be connected in one workspace, with separate threads, schedules, and reputation dashboards, subject to the plan allowance.

What does the monitor track?

The live health monitor tracks sender score, inbox placement, and spam rates across major providers.

Facts from InboxPlan's own pages

Account security: InboxPlan says it uses standard OAuth and does not store users' passwords. · inboxplan.com, 3 Oct 2026
AI conversations: Its AI generates unique, human-like business conversations for warm-up threads. · inboxplan.com, 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, 3 Oct 2026
Authentication: InboxPlan says it uses OAuth and does not store users’ passwords. · inboxplan.com, 4 Oct 2026
Deliverability monitoring: A live health monitor tracks sender score, inbox placement, and spam rates across major providers. · inboxplan.com, 3 Oct 2026
Founded: 2022 · inboxplan.com, 28 Sept 2026
Headquarters: San Francisco, California, United States · inboxplan.com, 28 Sept 2026
Health monitoring: The live health monitor tracks sender score, inbox placement, and spam rates across major providers. · inboxplan.com, 4 Oct 2026
Integrations: The site says users can connect Gmail, Outlook, Zoho, or custom SMTP accounts. · inboxplan.com, 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, 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, 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, 4 Oct 2026
Purpose: InboxPlan provides automated email warm-up, smart scheduling, and deliverability analytics to help emails reach the inbox. · inboxplan.com, 4 Oct 2026
Reply simulation: InboxPlan simulates two-way AI conversations to create engagement signals. · inboxplan.com, 4 Oct 2026
Scheduling: Smart scheduling randomizes send windows and ramps volume automatically. · inboxplan.com, 4 Oct 2026
Seed network: InboxPlan says its private seed network includes 500+ verified inboxes across major email providers. · inboxplan.com, 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, 4 Oct 2026
Setup: InboxPlan says setup takes under two minutes. · inboxplan.com, 4 Oct 2026
Supported connections: The site says users can connect Gmail, Outlook, Zoho, or custom SMTP accounts. · inboxplan.com, 4 Oct 2026
Trial: The homepage advertises a 7-day free trial and says a credit card is required. · inboxplan.com, 4 Oct 2026
Warm-up volume: InboxPlan says it typically starts at 3–5 emails per day in week one and scales to 30–50 per day by week four. · inboxplan.com, 3 Oct 2026

Where InboxPlan stands on Freedom251

Email Warmup Software#18 of 24