Instantly vs Maildoso (2026): which should you pick?

Pick Instantly if

• Fits if you send from lots of mailboxes and don't want to pay per inbox or per seat
• Works for teams that want warm-up included rather than bought per mailbox

Look elsewhere if

• Skip it if you want LinkedIn steps in the same sequence, as Instantly is email only
• Tight if you stay on Growth, with 1,000 contacts in total, a read-only inbox and no webhooks
• Pricey if you need lead data too, since credits start at $9 a month for 150, and on Growth the CRM is only a 14-day trial
• Watch out: the contact limit is a running total, not monthly, and 25,000 more cost $87 a month
• Watch out: there's no free plan, and the trial stops at 250 contacts and 1,000 emails

Pick Maildoso if

• Fits if you need 30 or more mailboxes for an outbound team
• Works for senders who already run Instantly or Smartlead

Look elsewhere if

• Skip it if you need just a few mailboxes, since 30 is the smallest block
• Not for you if you want a trial or a discount, because neither exists
• Watch out: domains cost extra, $15 a year or $11.90 a month pre-warmed
• Tight if you want volume per mailbox: 15 cold emails a day each

Instantly

• There is no free plan; the 14-day trial stops at 250 uploaded contacts and 1,000 emails.
• The uploaded-contact limit is a total across all campaigns, not a monthly one. On Hypergrowth and up, 25,000 more contacts cost $87 a month.
• Lead data and the AI agents need an Instantly Credits plan, from $9 a month for 150 credits; on Growth the CRM is only a 14-day trial.
• Replying from Unibox, webhooks, the CRM and full A/Z testing need Hypergrowth, $107 a month billed monthly.

Maildoso

• Each mailbox sends at most 15 cold emails and 80 warm-up emails a day, and new mailboxes still need about 14 days of warm-up unless they sit on pre-warmed domains.
• Domains are not included in monthly plans: registration is $15 a year and a pre-warmed domain is $11.90 a month.
• Quarterly plans with domains included are labeled legacy on the pricing page; the monthly blocks are the current plans.
• Subscriptions are canceled through support chat or email, and the page says it has a no-discount policy with no promotions.

Instantly

Unlimited sending accounts and warmup

Every Outreach plan connects and warms up any number of email accounts from any provider; the plan limits emails sent and contacts uploaded instead.

Sequences and A/Z testing

Multi-step campaigns with sending schedules, a global block list and bounce detection. Growth gets basic A/Z testing; Hypergrowth and above test up to 26 variants.

Unibox

Replies from every connected account land in one inbox. It is preview-only on Growth; replying in the app and custom reply labels start at Hypergrowth.

SuperSearch lead database

Search more than 450 million B2B contacts and enrich them through several email providers, paid for with Instantly Credits, a separate subscription.

AI Sales Agent and AI Reply Agent

Agents that find and contact leads or draft answers to replies. Each lead or reply generated costs 5 credits from the credits plan.

Automations

A visual trigger-and-action builder routes and tags leads when they reply, visit your site or book a meeting, and is included on every Outreach plan.

Maildoso

Mailboxes built for outbound

Dedicated mailboxes on the vendor's own servers and IPs, with IP rotation and automatic replacement of IPs that stop working.

Automatic DNS setup

SPF, DKIM and DMARC records are configured when you register mailboxes under a domain bought or connected through the dashboard.

Self-healing and health scores

Burned-out mailboxes are disconnected from campaigns for 14 days, and inbox placement tests run every 3 days with a health score per mailbox.

Sequencer export

Mailboxes can be exported to outreach platforms; Instantly, Smartlead and EmailBizon sync with one click, and the vendor says 9 sequencers are supported.

API and MCP server

Register domains, create mailboxes and push them to a sequencer from code or from an AI assistant such as Claude.

Pre-warmed domains

Domains warmed in advance, each holding up to 50 mailboxes, so new mailboxes can start sending without the usual 14-day wait.

Instantly

• Growth$37.6

  per month for 5,000 emails, billed yearly ($47 monthly)

  1,000 uploaded contacts, unlimited email accounts and warmup, basic A/Z testing and a preview-only Unibox.

• Hypergrowth$85.58

  per month for 125,000 emails, billed yearly ($107 monthly)

  25,000 uploaded contacts, the built-in CRM, replying from Unibox, webhooks, A/Z tests of up to 26 variants and premium live support.

• Light Speed$286.3

  per month for 500,000 emails, billed yearly ($358 monthly)

  100,000 uploaded contacts, the CRM, and SISR, which rotates dedicated servers and IP addresses for sending.

• EnterpriseCustom

  More than 500,000 emails a month, a private deliverability network and a dedicated account manager.

Maildoso

• 30 mailboxes$75

  per month for 30 mailboxes ($2.50 each)

  Aimed at early-stage teams. Up to 15 cold emails a day per mailbox, plus the features every plan includes.

• 300 mailboxes$225

  per month for 300 mailboxes ($0.75 each)

  Aimed at expanding teams. Same features and 15-a-day limit per mailbox as the smaller block.

• 1,000 mailboxes$499

  per month for 1,000 mailboxes ($0.49 each)

  Aimed at large-scale campaigns. Same features and per-mailbox limit.

Instantly

• Annual discount

  About 20% off with yearly billing

  Billed yearly, Growth is $37.6 a month instead of $47, Hypergrowth $85.58 instead of $107 and Light Speed $286.3 instead of $358.

Maildoso

No public discounts listed.