Mixmax vs Reply.io: Cold Email Platform Comparison

Mixmax vs Reply.io: Cold Email Platform Comparison

Reply.io prices its Email Volume plan on a slider, not a tier. The $49 you see is the slider's opening position at 1,000 active contacts a month, and the positions run up to 500,000. Mixmax prices per seat with a hard ceiling: 1,500 sequence recipients a month per seat, whatever you pay. One of these products stretches and the other stops.

The Short Answer

Pick Reply.io when volume will grow and you want the price to grow with it rather than the tool to run out. Pick Mixmax when your reps live in Gmail and the work worth paying for happens after the reply.

Read Reply's own definition of an active contact before comparing anything: it is a unique person you may send one first-step email and unlimited follow-ups to in a month. That definition is generous for sequences and irrelevant to anyone who sends one message and stops.

What Mixmax And Reply.io Actually Are

Mixmax is a sales engagement platform for Gmail sold as named Copilots, $29 a seat billed annually for Inbox or Meeting Copilot, $49 for Engagement Copilot and $89 for Mixmax Suite, monthly $34, $34, $65 and $105. Sequence recipients cap at 1,500 a month per seat.

Reply.io is a multichannel sales engagement platform with an AI SDR product beside it. Its pricing page lists Email Volume from $49 per user a month billed annually against a slider from 1,000 to 500,000 active contacts; Multichannel starts at $89 per user with unlimited active contacts and 10 mailboxes; Jason AI SDR starts at $500 a month billed annually.

Reply's add-ons are separate and published: LinkedIn automation at $69 a month per account and calls and SMS at $29 a month per account. Mixmax's dialer, SMS, international dialer and local presence are add-ons on every tier too, so both products sell channels beside the base rate.

Pricing Compared

$0/moMixmax entry plan

Free, 50 sequence recipients a month

$49/moReply.io entry plan

Email Volume, billed annually

Mixmax Pricing

Mixmax sells four named Copilots rather than a single ladder, and the last column is the one that decides whether it fits cold outbound at all. The sequence recipient cap is 1,500 a month per seat on both paid tiers that carry sequences, and 3,000 on the custom team plan. Dialer, SMS, international dialer and local presence are add-ons on every tier.

Source: Mixmax pricing

Reply.io Pricing

Reply prices the Email Volume plan on a slider rather than a tier, and the $49 headline is the slider's opening position at 1,000 active contacts a month. Its own definition of that unit is the part to read: an active contact is a unique person you may send one first-step email and unlimited follow-ups to in a month. LinkedIn automation is $69 a month per account and calls and SMS $29 a month per account, both on top.

Source: Reply.io pricing

Where the slider crosses the seat price

Here is an invented but arithmetically honest example built from both vendors' published units. It is illustrative only and nothing in it comes from a customer.

Two reps, 3,000 contacts a month between them. On Mixmax Suite billed annually that is 2 at $89, so $178 a month, and the allowance is 2 times 1,500, which is exactly 3,000. It fits, with nothing spare.

Add a third rep and 6,000 contacts. Mixmax is 3 at $89, so $267, with 4,500 recipients against 6,000 needed, so it no longer fits and the only remedy is buying seats for allowance. On Reply, Email Volume at three users starts from 3 times $49 and the slider moves to the contact volume you actually need, so the price rises rather than the tool refusing.

Now add LinkedIn. Reply charges $69 a month per LinkedIn account on top, which is a real line for a three-rep team, and Mixmax has no LinkedIn automation on its list at all. Price the channels you will use before comparing base rates, because on both products the base rate is the smaller half of the bill for a multichannel team.

Who Should Pick Which

Pick Reply.io when the plan is to grow. The slider means the tool does not become the constraint, unlimited email warmup comes with every mailbox and a 1 billion contact database sits behind the same subscription.

Pick Mixmax when the reps are Gmail natives and meetings are the output. Scheduling, recording, summaries and CRM sync are what the seat buys, and no amount of Reply's volume replaces them.

Both are poor value for a team that sends one message and stops, which is our own practice. In that world Reply's active-contact definition gives you follow-up capacity you will not use, and Mixmax's recipient cap costs you reach you do need.

Answer yes to the top two and Reply.io wins

• ✓Yes: Your monthly contact volume will grow past 1,500 per rep
• ✓Yes: You want LinkedIn or SMS steps in the same sequence
• ✓Yes: You want a contact database inside the sending tool
• ✕No: Meetings are booked and summarised from the inbox
• ✕No: Gmail is the only interface your reps accept
• ✓Yes: You want an AI SDR agent option later

What Each One Lists

Both lists are each vendor's own wording from its own pages. Both send sequenced email with AI personalisation and sync to a CRM, so read them as advertising rather than as a capability audit.

Mixmax lists

• AI-powered email sequences
• Email tracking and analytics
• Meeting scheduling (1-click)
• Conversation intelligence
• Multichannel sequences
• AI email personalization

Reply.io lists

• Unlimited email warmup
• 1 billion B2B contacts database
• Anti-spam and deliverability suite
• LinkedIn automation (add-on)
• SMS and calls (add-on)
• AI personalization

Mixmax Key Features

• AI-powered email sequences
• Email tracking and analytics
• Meeting scheduling (1-click)
• Conversation intelligence
• Multichannel sequences
• AI email personalization
• Inbox categorization and smart signals
• CRM auto-sync
• Custom branding (add-on)
• Dialer and SMS (add-on)

Reply.io Key Features

• Unlimited email warmup
• 1 billion B2B contacts database
• Anti-spam and deliverability suite
• LinkedIn automation (add-on)
• SMS and calls (add-on)
• AI personalization
• AI SDR capabilities
• Multi-workspace for agencies
• 14-day free trial

Reply's list is an outbound platform with data attached: unlimited email warmup, a billion-contact database, an anti-spam and deliverability suite, LinkedIn and SMS as add-ons, an AI SDR. Mixmax's is an inbox workspace: scheduling, conversation intelligence, inbox categorisation, smart signals, CRM auto-sync. Both list AI personalisation, which is real overlap. The genuine gap is that only one of them ships a deliverability suite and unlimited warmup, and that is the half cold sending depends on.

Integration Ecosystem

Mixmax connects with: Gmail, Google Workspace, Salesforce, HubSpot, Pipedrive, Slack, Zoom, Calendly, Zapier.

Reply.io connects with: HubSpot, Salesforce, Pipedrive, Copper CRM, Zendesk Sell, Close, Zapier, Make, n8n.

Both lists carry: Salesforce, HubSpot, Pipedrive, Zapier.

Reply's list is CRM-heavy and unusually broad on the automation side, carrying Copper CRM, Zendesk Sell and Close alongside HubSpot, Salesforce and Pipedrive, plus Zapier, Make and n8n. Mixmax's is narrower and Gmail-centred, adding Zoom and Calendly because meetings are its output. If your CRM is unusual, Reply is more likely to already speak to it.

Where Mixmax And Reply.io Sit In A Cold Outbound Stack

Reply.io can be the whole sending layer, including warmup and a contact database. Mixmax is the layer between an inbox and a CRM, and its sending is bounded.

Our own house rule sharpens the choice: we send one message per campaign and never bump a thread, so Reply's active-contact model, which prices one first-step email plus unlimited follow-ups, gives us capacity we deliberately do not use. What still matters from Reply is the warmup and deliverability suite. What matters from Mixmax is everything after the reply. Many teams end up running one of each rather than choosing.

Switching Between Them

Moving from Mixmax to Reply means rebuilding sequences and connecting mailboxes, and the mailbox count is the number to plan: Multichannel includes 10 mailboxes and extra sending capacity is bought by adding more. Turn on warmup before the first campaign rather than after, since it is included with every mailbox and needs a runway.

Going the other way, the cap is the shock. A Reply user with unlimited active contacts on Multichannel who moves to Mixmax Suite has 1,500 recipients a month per seat. Segment first, move the accounts where a booked meeting is the goal, and keep a sending tool for the rest.

Getting Started

1. Count contacts per rep per month and check them against Mixmax's 1,500 cap and Reply's slider positions.
2. Read Reply's definition of an active contact before pricing it, because it assumes follow-ups you may not send.
3. Price the channel add-ons: Reply's pricing page lists $69 a month per LinkedIn account and $29 per calls and SMS account.
4. Check whether warmup is included where you need it; Reply includes it with every mailbox.
5. Run the same 200 contacts through both and compare inbox placement and what each writes back to the CRM.

Final Thoughts

Reply.io stretches and Mixmax stops, and that is the whole shape of this comparison. The slider means growth costs money rather than a migration; the seat cap means growth costs a migration.

If meetings booked from the inbox are the valuable part of your day, Mixmax earns its seat rate and Reply does not replace it. If reach is the constraint, there is no version of Mixmax that solves it.

Related Reading

• Best Mixmax Alternatives in 2026
• Best Reply.io Alternatives in 2026
• Mixmax vs Outplay: Cold Email Platform Comparison
• Email sequence software
• Email warmup services
• Cold email sequence benchmarks

If you would rather have this run for you, RevenueFlow books qualified meetings on a pay-per-meeting basis and publishes client results.

Pricing and features are taken from the vendors' own pages. Verify current terms with the vendor before relying on them.