CRM

For sales-led outbound (cold email, sequences, lead scraping) see Sales Engagement. For the all-in-one accounting + CRM + inventory route see ERP Systems. For helpdesk / ticketing see Helpdesk & Ticketing.

Open source / self-host

• ★ Twenty — modern Notion-feeling CRM, TypeScript, GraphQL; AGPLv3. The default OSS pick in 2026 if you want a CRM that doesn't look like 2014. Hosted free trial on twenty.com.
• ★ EspoCRM — mature, PHP, GPLv3; broad module set (sales, support, marketing); the most-deployed OSS CRM. Best "I want a real CRM, free, today" pick.
• SuiteCRM — fork of the old SugarCRM Community Edition; AGPLv3. Heavyweight, enterprise-flavored; still actively maintained.
• Krayin — Laravel-based, MIT-licensed; lighter than EspoCRM; growing.
• Vtiger Open Source — long-running PHP CRM; community edition is free, hosted Vtiger Cloud is paid.
• Frappe CRM — newer Frappe-ecosystem CRM; pairs cleanly with ERPNext / Frappe HR / Frappe Helpdesk if you're already there.
• OroCRM — B2B-flavored, mid-market; Symfony-based.
• Monica — personal CRM (remember birthdays, who introduced whom); AGPLv3. Not a sales CRM; great for relationship hygiene.
• YetiForce — Polish-origin; very feature-dense; can be overwhelming.

Hosted (genuinely free tiers)

• ★ HubSpot CRM Free — unlimited users, 1M contacts; the most generous free tier in the SaaS CRM space. Upgrades sell hard but the free tier is genuinely useful for years.
• ★ Zoho CRM Free — up to 3 users, decent feature set; integrates with the rest of Zoho One.
• Bitrix24 Free — up to 5 users; bundled with tasks / chat / drive; UX is dated but it's free.
• Folk — small, modern; small free tier.
• Attio — modern Notion-shape CRM; free tier for individuals; paid for teams.
• Capsule CRM — small, simple; free for up to 2 users.

Modern / startup-flavored (paid)

• Attio — relationships graph + custom objects; popular with startups.
• Pipedrive — sales pipeline-first; mid-market; affordable.
• Close — outbound sales CRM with built-in calling.
• Salesforce — incumbent; expensive; every enterprise integration exists for it.
• Microsoft Dynamics 365 Sales — enterprise.

Personal CRM

• ★ Monica — open source; lifecycle / relationship CRM for individuals.
• Clay (the people one, not the data-enrichment one) — closed; iOS / web; pulls from your social graph.
• Dex — personal CRM; mobile-first.

Inside an ERP

• ★ ERPNext CRM — full CRM module sharing one DB with accounting / inventory / HR. Default if you'll grow into ERPNext anyway.
• Odoo CRM — solid; Community is free; many "good" automation features sit in Enterprise (paid).
• Dolibarr Leads — light CRM inside Dolibarr.

License watch-outs

• Twenty, EspoCRM, SuiteCRM, Monica, YetiForce, ERPNext — all AGPLv3 / GPLv3. Self-host is fine; review legal if you embed in a commercial product.
• Krayin — MIT.
• Frappe CRM — GPLv3.

Pick this if…

• Modern OSS CRM, want it to look 2026: Twenty.
• Mature OSS, deploy today, don't think about it: EspoCRM.
• Already on Frappe / ERPNext: Frappe CRM or ERPNext CRM.
• Free hosted, real feature set, growing into paid: HubSpot Free.
• Personal relationship tracking: Monica.
• Sales-led outbound from day one: skip OSS CRM, start on Close or Pipedrive — the integrations matter.