OSS Cold Email Sender (Show HN) Alternatives (2026)

Free CRM with deal pipeline, contact management, email tracking, and meeting scheduling. Scales from solo consultant to full agency without switching platforms.

B2B sales intelligence and engagement platform. Build targeted prospect lists → enrich data → reach out with multichannel sequences. Generous free tier available.

Cold email and sales engagement platform with a built-in lead database, deliverability tools, and AI-powered reply handling. Prospect → Reach out → Win deals — one workflow.

AI-powered multichannel sales engagement. Email, LinkedIn, SMS, phone, and WhatsApp outreach with AI-generated sequences and an autonomous AI sales agent.

Cold email outreach with unlimited mailbox rotation, warmup, and a unified inbox. Write → Send → Rotate → Track — all in one workflow.

Cold email platform with built-in email verification, warm-up, and campaign automation. Find leads, sequence outreach, and protect deliverability in one place.

Cold email outreach platform focused on deliverability, sender rotation, and scaling with unlimited email accounts.

Prospecting and outreach suite covering lead discovery, email verification, drip campaigns, and CRM workflows.

AI sales platform for prospecting, sequencing, and workflow automation.

Gmail native mail merge and outreach sequences for lightweight outbound.

Email discovery, verification, and outbound sequences in one workflow.

Multichannel prospecting across email, LinkedIn, and phone — one workflow, not three tools. Massive built-in contact database and email warmup included.