Open source user-facing product integrations
Integrations Library for Vessel's Embedded Integrations Platform
Universal B2B outreach skill for Claude Code. 16 sub-skills + 5 sub-agents: ICP targeting, lead sourcing, email finder, phone finder, verification, AI personalization, multichannel sequences, deliverability, campaign launch, reply handling and GDPR compliance.
Open-source Apollo alternative: cold-outreach engine that verifies every mailbox before sending. Email discovery, SMTP verification, bounce-proof delivery. Self-hosted or hosted. Free Hunter.io / Instantly / Clay alternative.
AI-Powered B2B Outreach Plugin 2026: Persistent Briefing & 40 Skills for Claude Code
Open-source alternative to hosted LinkedIn engagement tools like Extrovert. Tracks the people you want to know, reads their posts every morning, and drafts one honest comment on each post worth engaging with. AI suggests, you decide, you post. Free to run on GitHub Actions.
Self-hosted AI SDR for B2B outreach: LinkedIn sequences, cold email, and lead enrichment. Open-core, built with Next.js, TypeScript, Playwright, and SQLite.
Open-source, channel-agnostic sales engagement engine
LeanData — independent third-party profile of a public API surface, by API Evangelist. LeanData is a Sunnyvale, California revenue orchestration platform built on the Salesforce ecosystem. The company is best known for inventing lead-to- account matching and lead routing for B2B revenue teams; its managed package on the Salesforce AppExchange has b
An AIsales agent that autonomously sources leads via Apollo, researches prospects, and drafts highly personalized outreach sequences using Gemini 2.5.
Vymo — independent third-party profile of a public API surface, by API Evangelist. Vymo is a sales-engagement and distribution-management platform for financial institutions — banks, insurers, and asset managers — helping field sales and collections teams manage leads, allocate and prioritize activities, and capture engagement in a mobile-first app
Salesloft — independent third-party profile of a public API surface, by API Evangelist. Salesloft is a sales engagement and revenue orchestration platform. APIs cover cadences, people, accounts, calls, emails, meetings, and webhooks.
ToutApp — independent third-party profile of a public API surface, by API Evangelist. ToutApp was a sales-engagement platform founded in 2011 by Tawheed Kader that gave sales teams email templates, email tracking, campaigns, and analytics for outbound selling, backed by Andreessen Horowitz.
Nooks — independent third-party profile of a public API surface, by API Evangelist. Nooks is an AI-native sales engagement platform positioned as "The Agent Workspace for Intelligent Outbound," where sales representatives and AI agents collaborate on prospecting, sequencing, and dialing inside a single workspace.
Lavender — independent third-party profile of a public API surface, by API Evangelist. Lavender is an AI email intelligence company for sales teams. Its Email Coach is a browser extension and Outlook add-in that scores and coaches outbound sales email in real time — subject line, structure, tone, length and personalization — using models trained on
Tout — independent third-party profile of a public API surface, by API Evangelist. Tout (ToutApp) was a sales engagement platform offering email tracking, templates, and analytics for sales teams, and a 500 Global portfolio company. ToutApp was acquired by Marketo in 2017 and became Marketo Sales Connect; toutapp.com now 301-redirects to the Market
PersistIQ — independent third-party profile of a public API surface, by API Evangelist. PersistIQ is a sales engagement platform for small teams to find new customers, start conversations, and personalize sales outreach at scale from one place. It combines prospect research (Chrome extension), multi-channel outreach (email, calls, tasks), campaign
RingDNA — independent third-party profile of a public API surface, by API Evangelist. RingDNA (now Revenue.io) is an intelligent revenue platform providing REST APIs for sales dialing, call recording, conversation analytics, real-time coaching, and CRM integration. The platform is 100% Salesforce-native and serves revenue teams with AI-driven sales
Top Sales Engagement Platform 🌟 Star if you like it! 🌟
SPOTIO — independent third-party profile of a public API surface, by API Evangelist. SPOTIO is a field sales engagement and territory management platform for outside sales teams - lead and prospect tracking, activity logging, territory mapping and assignment, route optimization, appointment setting, and pipeline visibility, delivered through a mobi
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