Seamless.AI in one line: A B2B contact search engine and sales platform that finds emails and phone numbers, with a Chrome extension, buyer intent, job change tracking, emailing and calling. Still, it is not the right fit for everyone. Here are 8 alternatives, what each one costs and who each one is best for, using facts from each vendor’s own site.

Why people look for Seamless.AI alternatives

• No prices published; paid plans require a quote
• Calling features are plan-specific or add-ons and telephony minutes typically cost extra
• Integration access depends on plan and usage can consume credits
• No LinkedIn automation, SMS or WhatsApp mentioned

None of these make Seamless.AI a bad tool. They just mean another option may fit your budget or your way of prospecting better.

Quick comparison

1. LeadGen.tools

Reads your website, finds real companies that need what you sell (including small local businesses), finds the person who decides at each one, writes a different email for every prospect and sends it with follow-ups from your own inbox.

Pricing

• Free: $0 · A real campaign to 10 prospects with follow-ups, no card
• Personal: $24.99/month · Unlimited campaigns and follow-ups, up to 3 decision makers per company, autopilot, no LeadGen.tools signature
• Business: $59.99/month · 3 sending inboxes, 3 brands, 3 collaborators

Free option: Yes: a real campaign to 10 prospects with follow-ups, no card

Why choose it over Seamless.AI

• Chooses your best customer segments from your website, never your competitors
• Finds small and local businesses that B2B databases often miss
• Finds the person who decides at each company, verified emails only
• A different email for every prospect, plus follow-ups that stop on any reply
• Pay per prospect contacted (follow-ups included), free plan to start

Keep in mind

• No inbox warm-up included
• Sends from Gmail or SMTP (no Microsoft 365 connection yet)
• Fewer sending inboxes per plan than volume-focused senders

Best for: Small teams, agencies and founders who want customers found and emails written for them, especially when selling to small or local businesses.

Full comparison: LeadGen.tools vs Seamless.AI

2. Apollo.io

An all-in-one sales platform that combines a B2B contact database with email sequences, a dialer, AI research and deal management.

Pricing

• Free: $0 ($0) · 75 credits per seat per month (900 per year), 2 sequences per team, 1 mailbox per user, 250 daily email sends, AI writing 5,000 words per month, Gmail only, API access
• Basic: $65/seat/month (monthly billing) ($49/seat/month billed annually) · 2,500 credits per seat per month (30,000 per year on annual billing), unlimited sequences, 1 mailbox per user, 250 daily email sends, deliverability suite and email warmup, domain and mailbox purchasing, CRM integrations, US dialer (credits apply), AI writing 250,000 words per month
• Professional: $99/seat/month (monthly billing) ($79/seat/month billed annually) · 4,000 credits per seat per month (48,000 per year on annual billing), unlimited sequences and A/Z testing, unlimited Google and Microsoft mailboxes + 5 SMTP mailboxes per user, unlimited daily sends, AI agents, AI lead scoring, call recordings and AI insights (4,000 mins), AI writing 800,000 words per month
• Organization: Annual only (the monthly view shows $149/seat/month marked 'Annual Only') ($119/seat/month billed annually, minimum 3 seats) · 6,000 credits per seat per month (72,000 per year), unlimited Google and Microsoft mailboxes + 15 SMTP mailboxes per user, SSO, custom reports, use your own LLM API key, AI writing 1,000,000 words per month

Free option: Yes. $0 with 75 credits per seat per month (900 per year), 2 sequences, 250 emails per day, Gmail mailboxes only; stays free with no time limit.

Why choose it over Seamless.AI

• Large built-in contact database (240M contacts, 30M companies stated) combined with sequencing in one tool
• Permanent free plan with credits, 2 sequences and API access
• Built-in dialer, call recording and meeting tools on paid plans
• Email warmup, deliverability suite and domain and mailbox purchasing included from Basic
• Integrations with Salesforce, HubSpot and Pipedrive plus MCP for LLMs

Keep in mind

• Priced per seat; the Organization plan requires a minimum of 3 seats and is annual only
• Unused credits expire each billing cycle and do not roll over
• Free and Basic plans are limited to 1 mailbox per user and 250 daily email sends

Best for: Sales teams that want a contact database, sequences and a dialer in one per-seat platform.

Full comparison: Apollo.io vs Seamless.AI

3. Lusha

A B2B contact and company data platform for finding verified emails and phone numbers, with enrichment, buying signals, a Chrome extension and basic email sequences.

Pricing

• Free: $0 ($0) · 40 credits per month, 1 seat, no credit card required; verified emails and phones, basic and advanced filters, automated email sequences, call recordings and AI insights
• Starter: $49.90/month for 400 credits per month (monthly billing) ($37.45/month billed yearly for 4,800 credits per year) · 1 seat; lookalikes, bulk enrichment, AI assistant, 5 buying intent topics; API with strict rate limits
• Pro: $69.90/month for 600 credits per month (monthly billing) ($52.45/month billed yearly for 7,200 credits per year) · 2 free seats, API (strict rate limits), CSV enrichment, signals, webhooks; monthly credits roll over up to 2x
• Premium: $399.90/month for 3,400 credits per month (monthly billing) ($299.95/month billed yearly for 40,800 credits per year) · 5 free seats, API Advanced, team management, credit allocation, 5 buying intent topics with unlimited results; credits roll over up to 2x

Free option: Yes. $0 with 40 credits per month and 1 seat, no credit card required.

Why choose it over Seamless.AI

• Large contact database with direct dials (117M+ stated)
• Permanent free plan with 40 credits per month
• Native integrations with major CRMs and an MCP server for AI assistants
• Buying signals and intent topics on paid plans
• Lists GDPR, CCPA, SOC 2 and ISO certifications

Keep in mind

• Phone numbers cost 5 credits each
• Email sequences (Lusha Engage) capped at 1,000 emails a day; no warm-up or inbox rotation mentioned
• No LinkedIn automation, dialer, SMS or WhatsApp mentioned

Best for: Teams that mainly need accurate emails and direct phone numbers pushed into their CRM.

Full comparison: Lusha vs Seamless.AI

4. Instantly

Cold email platform with unlimited sending accounts and warmup, a B2B lead database sold as credits, a CRM and AI agents.

Pricing

• Growth (outreach): $47/month · Unlimited email accounts and warmup, 1,000 uploaded contacts, 5,000 emails/month
• Hypergrowth (outreach): $97/month · 25,000 uploaded contacts, 125,000 emails/month, premium live support
• Lightspeed (outreach): $358/month · 100,000 uploaded contacts, 500,000 emails/month, SISR system
• Starter (bundle): $94/month (monthly billing) ($85/month billed yearly) · 5,000 emails/month, 1,000 uploaded contacts, 1,500 credits/month, lead database access, AI Sales Agent

Free option: CRM can be used for free with no credit card (per its CRM page); no free outreach plan listed

Why choose it over Seamless.AI

• Unlimited sending accounts and warmup on all plans
• High monthly email volumes (up to 500,000)
• Own 450M+ B2B lead database
• Built-in CRM with calls and SMS, unlimited seats
• AI Reply Agent and AI Sales Agent

Keep in mind

• Lead data is sold separately as credits unless you buy a bundle
• Uploaded contact limits (1,000 on the entry plans)
• White-label requires Hypergrowth or higher

Best for: Senders who need high volume across many inboxes and want lead data, CRM and AI reply handling in one vendor.

5. Klenty

A sales engagement platform for SDR teams that combines email cadences with a calling dialer, SMS, WhatsApp follow-ups and AI call coaching.

Pricing

• Starter: $60/month billed quarterly (no monthly billing offered on the page) ($50/month billed yearly) · 15,000 contacts and 75,000 emails per month at the base tier; higher tiers: 25,000 contacts / 125,000 emails ($72 yearly, $90 quarterly), 50,000 / 250,000 ($125 yearly, $150 quarterly), 100,000 / 500,000 ($320 yearly, $400 quarterly), 200,000 contacts via sales. Email deliverability (custom domain tracking, random intervals, volume control), analytics, API, Zapier, A/B testing, personalization
• Growth: $85/user/month billed quarterly (no monthly billing offered on the page) ($70/user/month billed yearly) · Everything in Starter plus 200 calling minutes, cold calling, number auto-rotation, AI voicemail and IVR detection, 1-click-to-call dialer, social selling, SMS automation, CRM integrations, sales stage automation
• Plus: $119/user/month billed quarterly (no monthly billing offered on the page) ($99/user/month billed yearly) · Everything in Growth plus 1,000 calling minutes, 4,000 data credits (phone + email), account-based selling, Action AI, call coaching, AI battlecards, live transcription, AI call scorecard
• Add-on: Parallel & Power Dialer: $45/user/month · Parallel and power dialing

Free option: 14-day free trial, no credit card needed, full access to all features, up to 200 emails to prospects during the trial

Why choose it over Seamless.AI

• Strong calling stack: dialers, number rotation, AI voicemail detection, call coaching
• Email, calls, SMS and WhatsApp follow-ups in one cadence
• Native integrations with Salesforce, HubSpot, Pipedrive, Zoho and MS Dynamics
• High email volumes on Starter (75,000 emails/month at the base tier)
• 14-day trial without a credit card

Keep in mind

• No free plan
• No monthly billing shown: annual or quarterly only
• Calling, SMS and CRM integrations start at the Growth plan ($70/user/month yearly)

Best for: B2B SDR teams that mix cold email with heavy cold calling and want it all inside their CRM workflow.

6. La Growth Machine

A cloud-based multichannel prospecting tool that runs LinkedIn, email, X and call steps in one sequence, with lead enrichment included, billed per sending identity.

Pricing

• Basic: €60/month per identity (monthly billing); $70 in USD (€50/month per identity billed yearly; $60 in USD) · Channels LinkedIn + Email; 250 leads enriched/month; 1 sending email per identity; up to 3 identities; 3 team members; up to 3 running campaigns; company database, LinkedIn engagement, AI voice messages, AI writing assistant
• Pro: €120/month per identity (monthly billing); $135 in USD (€100/month per identity billed yearly; $110 in USD) · Channels LinkedIn, Email, Calls; 400 leads enriched/month; 5 sending emails per identity (rotating inbox); up to 6 active campaigns; unlimited identities; 25 team members; unified LinkedIn + email inbox, social warming, A/B testing, Zapier/Make/Clay/API
• Ultimate: €180/month per identity (monthly billing); $195 in USD (€150/month per identity billed yearly; $165 in USD) · Channels LinkedIn, Email, X, Calls; 1,000 leads enriched/month; 10 sending emails per identity; unlimited campaigns and team members; HubSpot / Pipedrive sync; dedicated support from 4 identities
• Agency / Custom: Custom, from €150 (talk to sales) · Agency plan: 6 identities minimum commitment; Custom plan: 6-month minimum commitment

Free option: 14-day free trial, no credit card required

Why choose it over Seamless.AI

• LinkedIn, email, calls and X in a single sequence with conditions per channel
• Cloud-based LinkedIn automation with dedicated mobile proxies and voice messages
• Enrichment credits included every month plus a 27M+ company database
• Unified LinkedIn + email inbox from Pro
• 14-day trial without a credit card

Keep in mind

• No free plan
• Billed per identity, so cost grows with each sender
• Native CRM sync (HubSpot/Pipedrive) only on Ultimate

Best for: B2B teams and agencies whose prospects are active on LinkedIn and who want LinkedIn plus email sequences automated together.

7. Snov.io

A sales platform that combines an email finder and verifier, a B2B lead database, email warm-up and email plus LinkedIn outreach campaigns with a built-in CRM.

Pricing

• Trial (free): $0 · Renewable monthly: 50 credits, 100 recipients, 25 enrichment tokens, 1 email warm-up, core tools only
• Starter: $39/month (monthly billing) ($29.25/month billed yearly (save $117/year)) · 1,000 credits, 5,000 recipients, 75 enrichment tokens, 3 email warm-ups, unlimited monthly emails, unlimited team seats, unlimited senders, MCP access
• Pro S: $99/month (monthly billing) ($74.25/month billed yearly (save $297/year)) · 5,000 credits, 25,000 recipients, 150 enrichment tokens, unlimited warm-ups, unlimited monthly emails, unlimited team seats
• Pro M: $189/month · 20,000 credits, 50,000 recipients, 150 enrichment tokens, unlimited warm-ups, unlimited team seats

Free option: Yes. Trial plan renewable monthly: 50 credits, 100 recipients, 25 enrichment tokens, 1 email warm-up, core tools only.

Why choose it over Seamless.AI

• Unlimited team seats and unlimited senders on every paid plan
• Email warm-up, 7-tier verification and deliverability checks included
• Email and LinkedIn steps in the same campaign with a shared inbox (LinkedIn as a paid add-on)
• Free Trial plan renews monthly
• Built-in CRM plus 2-way HubSpot and Pipedrive integrations

Keep in mind

• LinkedIn automation is a separate add-on billed per slot ($69/month, or $62/month annually)
• Usage is capped by credits and recipients per plan
• Free plan limited to 50 credits and 100 recipients with core tools only

Best for: Small teams that want lead finding, verification, warm-up and email plus LinkedIn campaigns in one tool without per-seat pricing.

8. lemlist

Sales engagement platform that finds leads in its own database and runs email, LinkedIn, call, SMS and WhatsApp sequences from one campaign.

Pricing

• Email: $69/month (monthly billing) ($55/month billed yearly (quarterly billing: $60/month)) · Unlimited users and email senders, 50,000 emails/month at the listed price (volume is selectable), email and phone finder, 650M+ lead database, lemAgent AI agents, MCP and CLI, email warm-up and Deliverability Hub, CRM integrations and API
• Multichannel: $109/month per user (monthly billing) ($87/month per user billed yearly (quarterly billing: $95/month)) · Everything in Email plus 5 senders per user, unlimited emails and messages, LinkedIn automation, SMS automation, WhatsApp automation add-on, built-in call dialer and VoIP integrations, use lemlist from Gmail and LinkedIn
• Enterprise: Custom (talk to sales) · Everything in Multichannel plus 5 or more senders per user, use lemlist from your CRM, custom roles and permissions, dedicated account manager, custom terms, SSO/SAML, priority support
• Lead data enrichment (add-on): $20/month ($16/month billed yearly) · 2,000 credits/month (400 emails or 100 phones), pay per success, unused credits roll over while subscribed

Free option: 14-day free trial, no credit card required; includes Multichannel plan features except in-app calls, plus 200 free credits

Why choose it over Seamless.AI

• Lead database (650M+) and email/phone finder inside the same tool as sequencing
• Email, LinkedIn, calls, SMS and WhatsApp in one campaign on the Multichannel plan
• Email plan includes unlimited users and email senders
• Warm-up and deliverability tools included in all plans
• 14-day trial without a credit card

Keep in mind

• No free plan
• Contact data (emails, phones) and intent signals are paid via credit add-ons
• LinkedIn, calls and SMS require the per-user Multichannel plan; WhatsApp is an extra add-on

Best for: Sales teams that want lead data, email and LinkedIn/phone outreach in one subscription and are fine paying per user for multichannel.

Facts from each vendor’s own pricing and product pages, last checked October 1, 2026: Seamless.AI, LeadGen.tools, Apollo.io, Lusha, Instantly, Klenty, La Growth Machine, Snov.io, lemlist. Prices change often, so check before you buy.

FAQ

What is the best alternative to Seamless.AI?

It depends on what you need. If you want the tool to find your customers and write the emails for you, LeadGen.tools. If you need the closest like-for-like replacement, look at Apollo.io, Lusha, Instantly.

Is there a free alternative to Seamless.AI?

Yes: LeadGen.tools, Apollo.io, Lusha, Snov.io offer a free plan.

Which Seamless.AI alternative is cheapest?

By listed starting price, LeadGen.tools (Free plan, then from $24.99/month). Compare what each plan includes, since limits differ a lot.