Seamless.AI alternatives: 12 tools compared (October 2026)

Amplemarket is a sales engagement platform from San Francisco for B2B sales teams. It combines a contact database, buying signals and multichannel sequences with the Duo AI agent, which suggests leads, writes first emails and drafts replies.

Key functions

• Duo Copilot spots buying signals and suggests leads with a ready sequence
• Duo Copywriter writes personalized first emails from profile and company data
• Duo Voice creates personalized voice messages from one voice sample

Compared with Seamless.AI

• Publishes a price (from $600 per month); Seamless.AI quotes on request.
• Different pricing model: flat fee instead of freemium.
• Strong in the same markets as Seamless.AI: United States.

Check before buying: Amplemarket hosts data in US data centers and bases transfers from Europe on the EU-U.S. Data Privacy Framework and standard contractual clauses. The lead database holds personal data of prospects, so check your legal basis and local cold email rules before outreach. Duo Voice reproduces an employee's voice, which calls for that person's documented consent. Request the DPA before signing.

Lusha is a B2B contact and company data platform from a Boston-based vendor for sales, marketing, recruiting and RevOps teams. It offers verified emails and phone numbers, buying signals, enrichment and AI recommendations that rank prospects against the ideal customer profile.

Key functions

• AI Recommendations rank contacts and companies daily by ideal customer profile and buying signals
• ICP scoring rates every prospect against the defined ideal customer profile
• Lookalikes find companies that resemble your best customers

Compared with Seamless.AI

• Publishes a price (from $37.45 per month); Seamless.AI quotes on request.
• Can store data in the EU; Seamless.AI states no EU option.
• Names 6 security certificates, Seamless.AI 0.

Check before buying: Lusha supplies personal data about business contacts, so check your lawful basis and notice duties under the CCPA and other US state privacy laws, and under the GDPR for European contacts, before outreach. Phone reveals use five credits each, which matters for calling teams. Teams of more than five users need the Scale plan through sales. The DPA and subprocessor list are part of the Trust Kit.

Nooks is an AI sales platform for outbound teams. It combines a parallel dialer, multichannel sequences, buying signals and call coaching, and syncs with CRMs such as Salesforce and HubSpot. It suits sales development and account teams that prospect by phone and email.

Key functions

• AI Dialer dials several numbers in parallel, detects pickups and logs voicemails, notes and next steps automatically
• AI Sequencing researches contacts, drafts personalized messages and recommends next steps across email, phone and social
• AI Coaching scores calls automatically, builds role plays from real calls and shows live prompts when objections come up

Compared with Seamless.AI

• Names 3 security certificates, Seamless.AI 0.
• Strong in the same markets as Seamless.AI: United States.

Check before buying: Check how outbound calls, texts and emails fit US rules: the TCPA and the Telemarketing Sales Rule for calls and texts, CAN-SPAM for email, and state laws on call-recording consent. Servers are in the United States, and a choice of hosting region was not found on the pages we reviewed in October 2026. Coaching scores individual reps, so agree internally how scores are used.

Regie.ai builds RegieGO, an agentic sales workspace for SDRs, account executives and founders who prospect themselves. AI agents build and enrich lists, write emails in the seller's voice, prepare calls and run a power dialer with follow-ups.

Key functions

• AI agents source and rank prospects, prep calls and handle follow-ups from a single prompt
• Relevant Messaging learns your writing voice from sent mail and gives every email a why-now reason
• AI Power Dialer builds the call list with scripts, skips answering machines and suggests call outcomes

Compared with Seamless.AI

• Publishes a price (from $41 per user/month); Seamless.AI quotes on request.
• Strong in the same markets as Seamless.AI: United States.

Check before buying: The privacy policy says RegieGO is intended for US-based business use and processes data in the United States. The customer is responsible for TCPA, CAN-SPAM and state call recording consent. Cloned voices require a signed release and fall under biometric laws such as Illinois BIPA. SSO, a DPA and a subprocessor list were not published when we checked in September 2026.

6sense is a B2B revenue platform for sales and marketing teams. It combines intent data, contact data and predictive models to show which accounts are in a buying window, and offers AI assistants for sellers and email campaigns.

Key functions

• Account Prioritization 6AI ranks accounts by buying stage and likelihood to buy
• Sales Copilot 6AI gives account and people intelligence with recommended actions
• Predictive models read buying signals from the Signalverse dataset

Compared with Seamless.AI

• Names 3 security certificates, Seamless.AI 0.
• Strong in the same markets as Seamless.AI: United States.

Check before buying: Prices are not public, and all three Sales Intelligence combinations require a demo. Data is processed in the United States, with the EU-U.S., UK and Swiss-U.S. Data Privacy Frameworks and standard contractual clauses covering transfers. The platform holds business contact data of prospects, so ask how opt-out and deletion requests under CCPA/CPRA and GDPR are handled, and request the DPA and the subprocessor list. The trust center is gated by an NDA.

Apollo.io combines a B2B contact and company database with email and phone outreach, aimed at sales teams from startups to enterprises, and adds AI assistants for account research, email writing and call analysis.

Key functions

• Research Assistant finds decision makers, lookalike accounts and lead lists from plain-language queries
• Writing Assistant drafts personalized emails in the brand voice
• Automated follow-ups triggered by prospect behavior

Compared with Seamless.AI

• Names 2 security certificates, Seamless.AI 0.
• Strong in the same markets as Seamless.AI: United States.

Check before buying: Apollo describes itself as a B2B data broker, so check the legal basis for contacting people from the database under GDPR and the UK and EU e-privacy rules before cold outreach in Europe. Plan the credit budget for exports, and confirm call recording consent rules.

Copy.ai is an AI platform for go-to-market teams that automates marketing content, account research and lead handling with configurable workflows, agents and a chat interface. It is aimed at marketing, sales and revenue operations teams.

Key functions

• Workflows chain AI actions into repeatable processes, for example SEO articles
• Copy Agents handle defined tasks within set guardrails
• Brand Voice and Infobase add tone and company knowledge to outputs

Compared with Seamless.AI

• Publishes a price (from $24 per month); Seamless.AI quotes on request.
• Different pricing model: flat fee instead of freemium.
• Strong in the same markets as Seamless.AI: United States.

Check before buying: Check which plan fits: Chat has 5 seats, while workflow plans start at 75 seats and are billed annually. Credit use per workflow run depends on its steps, so estimate volumes with the vendor. The privacy notice names storage in the US and the EU; request the SOC 2 report and a DPA. Deal coaching analyzes sales call transcripts, which can raise employee monitoring questions. Since October 2025 Copy.ai belongs to Fullcast, so ask about the roadmap.

Instantly is a cold email and sales engagement platform for agencies, founders and sales teams. It combines unlimited sending accounts with warm-up, a B2B lead database, a CRM and AI agents that find leads, write outreach, answer replies and book meetings.

Key functions

• AI Sales Agent reads your website, finds matching leads, writes messages and follows up
• AI Reply Agent answers interested prospects, handles objections and books meetings
• Copilot creates campaigns, lead lists and performance summaries on request, also as recurring tasks

Compared with Seamless.AI

• Publishes a price (from $47 per month); Seamless.AI quotes on request.
• Different pricing model: flat fee instead of freemium.
• Strong in the same markets as Seamless.AI: United States.

Check before buying: Instantly generally stores service data in the US, and its DPA covers transfers from Europe through standard contractual clauses. Under the terms, the customer is the legal sender of AI-written messages, including autonomous ones, so check CAN-SPAM and, for AI voice calls, TCPA consent rules. We found no security certificate on public pages in September 2026, so ask for current audit reports before signing.