10 Best Seamless.AI Alternatives for Founders [2026 Updated]

1. ZoomInfo

• Type: Paid
• URL: https://www.zoominfo.com
• Overview: ZoomInfo is an enterprise go-to-market intelligence platform with a large database of B2B contacts, company data, and buyer intent signals. It helps sales and marketing teams build prospect lists, enrich CRM records, and run outreach workflows.

2. Apollo.io

• Type: Paid
• URL: https://www.apollo.io
• Overview: Apollo.io combines a B2B contact database with email sequencing, dialing, and pipeline tools in one sales engagement platform. It offers a free tier with limited credits and paid plans for teams that need more volume.

3. Lusha

• Type: Paid
• URL: https://www.lusha.com
• Overview: Lusha provides verified B2B email addresses and direct phone numbers through a browser extension and web platform. It integrates with major CRMs and suits small to mid-sized sales teams that need quick contact lookups.

4. Cognism

• Type: Paid
• URL: https://www.cognism.com
• Overview: Cognism is a sales intelligence platform known for phone-verified mobile numbers and GDPR-compliant data, especially in Europe. It offers prospecting search, intent data, and CRM integrations for outbound sales teams.

5. RocketReach

• Type: Paid
• URL: https://rocketreach.co
• Overview: RocketReach lets users search for professionals and company information to find emails, phone numbers, and social profiles. It provides a web app, Chrome extension, bulk lookups, and an API for lead enrichment.

6. UpLead

• Type: Paid
• URL: https://www.uplead.com
• Overview: UpLead is a B2B lead database with real-time email verification and a data accuracy guarantee. It offers filters by technology, intent, and firmographics, along with CRM integrations and credit-based pricing.

7. Hunter

• Type: Paid
• URL: https://hunter.io
• Overview: Hunter helps users find and verify professional email addresses by domain or by person's name. It also includes a campaigns tool for cold email outreach, with a limited free plan and affordable paid tiers.

8. Kaspr

• Type: Paid
• URL: https://www.kaspr.io
• Overview: Kaspr is a LinkedIn-focused extension that reveals business emails and phone numbers of prospects. It is popular with European sales and recruiting teams and offers a free plan with limited credits.

9. Clay

• Type: Paid
• URL: https://www.clay.com
• Overview: Clay is a data enrichment and prospecting platform that aggregates many data providers into one spreadsheet-style workflow. It lets teams build targeted lead lists, enrich contacts, and automate personalized outreach with AI.

10. Wiza

• Type: Paid
• URL: https://wiza.co
• Overview: Wiza turns LinkedIn and Sales Navigator searches into verified email lists that can be exported to CRMs or outreach tools. It focuses on email verification and offers a free tier with limited credits plus paid plans.