Smartlead vs Instantly vs lemlist vs Reply.io

• Cheapest to start: Smartlead, with a Base plan from $39 a month✓
• Best for LinkedIn and calls in the same plan as email: lemlist✓
• Best for one fixed multichannel price across email, LinkedIn, SMS, and phone: Reply.io✓

4 tools side by side

	Smartlead	Instantly	lemlist	Reply.io
Starting price	From $39/month, Base plan✓	From $47/month, Growth plan✓	From $55/month, Email plan✓	From $49/user/month, Email Volume plan✓
What the entry plan includes	2,000 contacts, 6,000 email sends a month, unlimited mailboxes✓	1,000 uploaded contacts, 5,000 emails a month, unlimited mailboxes✓	50,000 emails a month, unlimited users and senders✓	1,000 active contacts a month, unlimited mailboxes under fair use✓
Warmup included	Yes, a private vetted-sender pool✓	Yes, a pool of 1,000,000+ real accounts✓	Yes, lemwarm on every plan✓	Yes, included free with every mailbox✓
Rotation	Automatic across all connected mailboxes✓	Server and IP rotation (SISR) on higher tiers✓	Automatic rotation across connected inboxes✓	Warmed mailboxes rotate across sequences✓
Placement testing	SmartDelivery placement-rate testing tool✓	Seed-inbox tests across Gmail, Outlook, Yahoo✓	Deliverability Boost checks copy and setup before sending✓	Not published on the pages we read
Multichannel steps (LinkedIn, calls)	Calls via SmartDialer add-on; no LinkedIn automation on the pages we read✓	Multichannel campaigns run email, LinkedIn, and webhook steps; no native calling found✓	Email, LinkedIn, and calls in one Multichannel plan✓	LinkedIn and Calls & SMS as paid add-ons, or bundled on the Multichannel plan✓
CRM integrations	HubSpot, Salesforce, Pipedrive via SmartDialer✓	50+ sales and outreach integrations✓	HubSpot, Salesforce, Pipedrive✓	HubSpot, Salesforce, Pipedrive, Copper, Zendesk, Close.io✓
Best for	Unlimited mailboxes at the lowest published entry price✓	Unlimited warmup and mailboxes on every paid tier✓	A large prospecting database plus LinkedIn and calls bundled with email✓	One fixed price across email, LinkedIn, SMS, and phone✓

Smartlead: unlimited mailboxes with metered contacts and email sends

Smartlead's pricing page lists four plans: Base at $39 a month, Pro at $94, Unlimited Smart at $174, and Unlimited Prime at $379, with 17% off on annual billing✓. Every plan, including Base, includes unlimited email accounts at no extra cost, so the platform does not charge per mailbox the way some competitors do✓. What is metered instead is contacts and email sends: the Base plan includes 2,000 contacts and 6,000 email sends a month, counted as two separate limits✓.

On deliverability, Smartlead automatically rotates sending across every connected mailbox inside a campaign, spreading volume to protect sender reputation✓. Its warmup network is described as a private, curated pool that only admits vetted senders✓, and Smartlead recommends warming an existing account for at least two weeks, or one to two months for a brand-new domain✓. For placement checks, SmartDelivery is described as a deliverability testing tool built around a placement-rate benchmark, with manual and automated tests✓. Smartlead also says its cold email API has inbox rotation built in, rotating sends across multiple accounts automatically✓, and its integrations page describes connections across sales, CRM, communication, automation, and productivity tools✓. For calling, Smartlead sells SmartDialer, an AI power dialer that dials prospects and automates post-call tasks✓, and SmartDialer syncs to Smartlead's own CRM plus HubSpot, Salesforce, and Pipedrive✓.

Where Smartlead falls short

Smartlead's contacts and email-send limits are two separate counters, so a team that adds contacts faster than it sends emails, or the reverse, needs to watch both numbers rather than a single quota✓. We found no LinkedIn automation feature on the Smartlead pages we read; the platform's multichannel step beyond email is SmartDialer for calls, sold as its own product✓.

Migration difficulty

Because unlimited mailboxes are included on every plan, including Base, connecting an existing set of sending accounts does not require an upgrade first✓. Smartlead's cold email API supports up to 25 named admin keys that can be managed independently, which helps a team split access across sub-accounts or client workspaces during a migration✓. Its documented CRM sync through SmartDialer to HubSpot, Salesforce, and Pipedrive gives an existing CRM-based team a defined path to connect calling data without custom development✓.

Instantly: unlimited warmup and mailboxes on every paid plan

Instantly's Growth plan, priced at $47 a month, includes unlimited email accounts and unlimited email warmup, along with 1,000 uploaded contacts and 5,000 emails a month✓. Moving up to Hypergrowth at $97 a month raises the limit to 25,000 uploaded contacts and 125,000 emails a month, while keeping unlimited accounts and warmup✓. Higher tiers add Instantly's SISR system, which automatically assigns dedicated server and IP blocks to protect and maintain deliverability✓.

On warmup specifically, Instantly says its deliverability pool has over 1,000,000 real email accounts that exchange warmup emails to build a positive sending reputation✓, and warmup begins with a slow ramp, sending only a few emails on day one before gradually increasing volume✓. Instantly defines an inbox placement test as sending test emails to seed inboxes across providers and reporting which folder each one reaches, run as unlimited, automated tests inside the platform✓, and it tests placement across Gmail, Outlook, Yahoo, and other leading mailbox providers✓. Beyond email, Instantly's outreach page describes multichannel campaigns that run email, LinkedIn, and webhook sequences✓, and its integrations page markets 50+ sales and outreach integrations✓.

Where Instantly falls short

Instantly's own outreach page frames LinkedIn as a channel inside a webhook-driven sequence rather than a native, built-in LinkedIn product the way lemlist or Reply.io describe theirs, and we found no dedicated calling feature on the pages we read✓. The SISR infrastructure that assigns dedicated server and IP blocks is described on the pricing page as a higher-tier feature, so a team on the entry Growth plan should confirm which tier includes it before relying on it✓.

Migration difficulty

Unlimited email accounts and unlimited warmup on the Growth plan mean a team can connect its full existing mailbox set from day one without paying per mailbox✓. Instantly's integrations page lists 50+ sales and outreach connections, which gives a migrating team a broad set of documented targets for syncing contacts and campaign data✓.

lemlist: a large prospecting database with LinkedIn and calls bundled in

lemlist's pricing page advertises a 650 million-plus lead database as part of its prospecting layer✓. Its Email plan starts from $55 a month and includes 50,000 emails a month along with unlimited users and unlimited email senders, so mailbox count is not a separate line item✓. Its Multichannel plan starts from $87 a month✓, and lemlist describes that plan as letting a team reach leads across email, LinkedIn, and calls, with SMS and WhatsApp available as add-ons✓.

On deliverability, lemlist says lemwarm and its built-in deliverability protections are included in every plan rather than sold separately✓. lemwarm automatically exchanges real emails with real inboxes to build sender reputation, letting the user set the pace✓, and lemlist caps daily sending per inbox, pausing automatically before an account hits unsafe limits✓. Beyond warmup, lemlist says it rotates sending across connected inboxes automatically so no single mailbox carries all the volume✓, and its Deliverability Boost feature checks a campaign's copy, technical setup, and inbox placement signals before it sends✓. lemlist's plan comparison table lists native CRM integrations with HubSpot, Salesforce, and Pipedrive✓.

Where lemlist falls short

lemlist's pricing page presents lead data, meaning finding and enriching contacts, as a separate add-on layered on top of the Email or Multichannel plan rather than bundled into the base price✓. A team that wants LinkedIn and calling has to move up from the $55 Email plan to the $87 Multichannel plan, since those channels are not part of the cheaper tier✓.

Migration difficulty

lemlist's credits, its currency for data features like finding contacts, enriching leads, and receiving buying signals, roll over for as long as the subscription stays active, so a migrating team does not lose unused capacity between billing cycles✓. Its documented native CRM connectors for HubSpot, Salesforce, and Pipedrive give an existing CRM-based team a defined sync path without custom development✓.

Reply.io: one fixed price across email, LinkedIn, SMS, and phone

Reply.io's Email Volume plan starts from $49 a user a month, billed annually, at its lowest tier of 1,000 active contacts, with tiers scaling up to 500,000 active contacts a month✓. Reply.io defines an active contact as a unique contact you can send one first-step email plus an unlimited number of follow-ups to in a month✓. The Email Volume plan includes unlimited mailboxes, subject to Reply.io's Fair Usage Policy✓, and warmup is included free with every mailbox✓.

For multichannel outreach, Reply.io's Multichannel plan bundles email, LinkedIn, SMS, and phone outreach at one fixed price starting from $89 a user a month, billed annually✓. On the Email Volume plan, LinkedIn automation and Calls & SMS automation are only available as paid add-ons, priced at $69 per account a month for LinkedIn and $29 per account a month for calls and SMS✓. Reply.io's LinkedIn automation can fully automate sending connection requests, messages, voice messages, viewing profiles, endorsing skills, and following profiles✓, and it describes multi-touch campaigns that combine LinkedIn messaging, InMails, emails, and calls in conditional sequences✓. On warmup mechanics, Reply.io says warmup starts the moment a mailbox is connected, building sender reputation through a peer-to-peer network of real inboxes with no bots✓, and warmed mailboxes then rotate across sequences to send high volumes without overloading any single account✓. Its pricing page lists CRM and workflow integrations including HubSpot, Salesforce, Pipedrive, Copper, Zendesk, Close.io, Zapier, and Make, plus an API, an n8n node, and MCP✓.

Where Reply.io falls short

We could not read Reply.io's dedicated email-deliverability page; it returned a Cloudflare challenge rather than page content, so we cannot say what, if anything, it publishes there about seed-inbox placement testing specifically✓. On the entry Email Volume plan, LinkedIn and calling are not included, they are separate add-ons at $69 and $29 per account a month, so the full multichannel experience means either those add-ons or the higher-priced Multichannel plan✓.

Migration difficulty

Reply.io's FAQ states that all plans include unlimited contact storage under its fair usage policy, with a default prospects limit of 100,000 that support can raise on request, which limits how much re-planning a migrating team needs to do around list size✓. Its documented CRM integrations with HubSpot, Salesforce, Pipedrive, Copper, Zendesk, and Close.io, plus Zapier, Make, an API, and MCP, give a migrating team several ways to sync data without custom development✓.

How the 4 tools handle deliverability: warmup, rotation, and sending limits

All four vendors bundle warmup into their plans rather than selling it as a standalone product. Smartlead calls its network a private, vetted-sender pool✓, Instantly says its pool has more than 1,000,000 real accounts✓, lemlist's lemwarm exchanges real emails between real inboxes at a pace the user sets✓, and Reply.io says warmup starts automatically the moment a mailbox connects, through a peer-to-peer network with no bots✓.

Rotation is where the four tools differ most in how they describe it. Smartlead and lemlist both describe automatic rotation across every connected mailbox as a built-in behavior, not an add-on✓. Instantly ties its strongest rotation feature, SISR, to dedicated server and IP blocks on higher-priced tiers✓. Reply.io describes rotation as something that happens after warmup finishes, moving sequences across already-warmed mailboxes to avoid overloading any single account✓.

On sending limits, the four vendors meter volume differently. Smartlead and Instantly both separate a contacts limit from an email-sends limit on their entry plans, so a campaign can hit one ceiling before the other✓. lemlist's Email plan caps monthly email volume directly, at 50,000 emails a month, without a separate contacts counter on the pages we read✓. Reply.io meters by active contacts, unique people who receive a first-step email plus unlimited follow-ups, rather than by a raw email count✓.

For placement testing specifically, only Smartlead and Instantly publish a named, dedicated feature: Smartlead's SmartDelivery runs manual and automated placement-rate tests✓, and Instantly's inbox placement test sends emails to seed inboxes across Gmail, Outlook, Yahoo, and other providers✓. lemlist's closest equivalent is Deliverability Boost, a pre-send check on copy, technical setup, and placement signals rather than a live seed-inbox test✓. Reply.io's pages we read describe an anti-spam and deliverability suite without naming a seed-inbox placement test, so we treat that specific feature as not published on the pages we read for Reply.io.

Which of the 4 tools should you choose?

Choose Smartlead if you want unlimited mailboxes on every plan, including the cheapest one, and you are comfortable tracking contacts and email sends as two separate limits✓.

Choose Instantly if unlimited warmup and unlimited mailboxes from the first paid plan matter most to you, and you can treat LinkedIn as a webhook-connected step rather than a native product✓.

Choose lemlist if you want a large prospecting database plus LinkedIn and calling in the same plan as email, and you are fine paying more once you need those channels✓.

Choose Reply.io if you want one fixed price that already covers email, LinkedIn, SMS, and phone outreach together, rather than assembling channels from separate add-ons✓.

FAQ

How we researched this

We read the pricing, product, warmup, integrations, and deliverability pages published by Smartlead, Instantly, lemlist, and Reply.io, all on September 30, 2026. Reply.io's dedicated email-deliverability page returned a Cloudflare challenge rather than content, so claims about Reply.io's deliverability come from its pricing and homepage instead. Every factual claim in this article links to the specific vendor page it came from, with an exact quote saved at the time we read it. Where a vendor did not publish a figure or feature on the pages we could read, we said so instead of estimating one.

How Modern Inbound can help

Picking a sending tool is one decision inside a larger outbound system: list building, verification, deliverability setup, sequencing, and reply handling all have to work together regardless of which of these four platforms sits underneath. Modern Inbound builds and runs that full system for clients, and can help you test any of these four tools against your own sending domains before you commit to a plan.