Instantly vs Mailshake
Instantly is built to send a lot of email from a lot of mailboxes. Mailshake is built for a small team running a smaller number of higher-touch sequences with the phone alongside. They compete for the same buyer at the entry price point — $47 against $29 — but they stop resembling each other the moment you look at mailbox limits.
Instantly
High-volume cold email with unlimited mailboxes and strong deliverability tooling.
Mailshake
Email plus a built-in power dialer, aimed at small teams doing multi-touch outbound.
| Feature | Instantly | Mailshake |
|---|---|---|
| Rating | 4.6 | 4.1 |
| Starting price | $47/momonthly billing | $29/momonthly billing; $25/mo billed yearly |
| Free trial | No | No |
| Email accounts | Unlimited | 1 (Starter) / 2 ($49) / 10 ($99) |
| Warmup included | Yes | Unlimited, all plans |
| Unified inbox | Scale plan+ | — |
| Lead database | 450M+ (separate Credits plan) | — |
| API access | Yes | — |
| Monthly emails | — | 1,500 (Starter), unlimited above |
| Dialer | — | Sales Engagement plan |
| Email verification | — | Unlimited |
Hands-on field test
In progressWe plan to run identical 200-contact campaigns from freshly warmed mailboxes on each platform (same copy, same sending window, same domains) and measure inbox-placement rate via seed tests, plus bounce and reply rates. Until that runs we quote no deliverability figures.
The verdict
Instantly is the right tool if volume is the strategy: unlimited connected mailboxes at every tier, warmup included, and a 450M+ lead database bundled into its higher plans. Mailshake is cheaper to enter and adds a genuine power dialer, but one mailbox on Starter and two at $49 makes it structurally unsuited to the mailbox-rotation approach most high-volume outbound depends on.
Choose Instantly if you are scaling volume and need unlimited mailboxes, bundled warmup, and optionally a large lead database in the same subscription. Choose Mailshake if your team is small, calls matter as much as email, and you would rather pay less for a focused tool than for sending capacity you will not use.
Instantly vs Mailshake: FAQs
- Which is cheaper to start?
- Mailshake, at $29/mo on monthly billing ($25/mo billed yearly) against Instantly's $47/mo Outreach Growth plan. Instantly's lead database is a separate Credits subscription from $47/mo rather than part of a bundle.
- How many mailboxes can I connect?
- Instantly allows unlimited connected mailboxes with no per-mailbox fee. Mailshake allows 1 on Starter, 2 on the $49 tier and 10 on the $99 tier. This is the single biggest structural difference between them.
- Is warmup included in both?
- Yes, and on Mailshake it is unlimited on every plan alongside unlimited verification and contact uploads. Instantly includes warmup as part of its deliverability suite.
- Can I try either free?
- Neither is straightforward here. Mailshake collects payment up front and offers no trial. Instantly does not advertise a free trial on its pricing page, so you would begin on a paid plan.
Comparing more than two?
Put Instantly, Mailshake and up to two others side by side on price, mailboxes, warmup and trials.
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