Instantly vs Mailshake

Instantly spreads high-volume cold email across many warmed inboxes with AI reply handling; Mailshake mixes email, LinkedIn and calls from 29 USD a seat.

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The verdict Side by side Plans and pricing Who each is for Other options

The verdict

Pick the tool that matches your motion, not the cheaper sticker price.

Instantly is the better volume machine. Unlimited inbox sending, automated warmup and AI reply handling are built for founders and agencies pushing large cold-email campaigns where the inbox itself becomes the bottleneck. The trade-off: email only, from 47 USD/mo, with the lead database billed separately.

Mailshake is the better multichannel sequencer. It runs email, LinkedIn and phone from one sequence and starts cheaper at 29 USD per user per month, so a solo founder gets in for less, though the per-seat model climbs as the team grows and it has no AI reply handling.

Neither has a free tier and both charge extra for lead data, so compare the all-in cost. If outbound for you means sending a lot of cold email, Instantly. If it means a multi-touch sequence across channels, Mailshake.

What the data says

Both cover 5 of the 6 features we compared.
Mailshake starts lower, at $25/mo against $85/mo.
Only Instantly has an MCP server, so an AI employee can work in it directly.
In our Outbound ranking, Instantly places 3 and Mailshake 12 of 33.

Side by side

Instantly and Mailshake compared
10 points compared	Instantly	Mailshake
Starts at	$85/mo	$25/mo
Free plan	No	No
API	Yes	Yes
MCP server	Yes	No
AI reply handling	Yes	No
Built-in email warmup	Yes	Yes
Built-in lead database	Yes	Yes
Built-in outreach (sequences/dialer)	Yes	Yes
LinkedIn automation	No	Yes
Unified inbox	Yes	Yes
Links	Visit	Visit

Plans and pricing

Instantly

StarterBundle with 5,000 emails per month, 1,000 uploaded contacts and 1,500 credits.$94/mo
ScaleBundle with 100,000 emails per month, 25,000 uploaded contacts and 5,000 credits.$194/mo
AgencyBundle with 500,000 emails per month, 100,000 uploaded contacts and 10,000 credits.$555/mo

Mailshake

Starter1 email address, 1,500 sends a month, unlimited contacts and campaigns. Annual shown as 25 per month.$29/mo/seat
Email Outreach2 email addresses, unlimited sends, rotation, unified inbox and CRM integrations. Annual shown as 45 per month.$49/mo/seat
Sales Engagement10 email addresses, unlimited sends and 5 phone numbers with a dialer. Annual shown as 85 per month.$99/mo/seat

Prices as the vendors list them. They change often; the final price is on their sites.

Who each is for

Choose Instantly if…

Choose Mailshake if your outreach is multi-touch rather than mass volume. You want one sequence that mixes email, a LinkedIn touch and a call, with a power dialer on higher tiers, and you are happy to handle replies manually. It starts cheaper at 29 USD per user per month, so a single founder gets going for less, and it still bundles warmup, deliverability tooling and an add-on contact finder. Just note the per-user pricing climbs as you add seats, and there is no AI reply handling.

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Choose Mailshake if…

Choose Instantly if cold email is your channel and volume is the lever. You are a founder or agency running large outbound campaigns, you need to spread sending across many warmed inboxes to protect deliverability, and you want a unified inbox with AI reply handling so the flood of replies does not bury you. You are fine being email-only and fine paying separately for the Lead Finder when you need data. From 47 USD/mo, per account rather than per seat, so it scales better across a team.

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