The $9 CRM for people who already run their own stack.
Bring your Twilio. Bring your domain. We don't sit between you and your tools — we just give you a place to act on them. CRM, bulk SMS, email campaigns, automations, AI integration. $9 flat. No tiers, no per-seat tax, no markup on your texts.
14 days free · card required (not charged until day 15) · cancel anytime
A CRM you actually own.
Solo founders, indie operators, marketing consultants, agencies of one or two. Anyone who'd rather connect their own Twilio + Resend than pay HubSpot $98/mo to send their own messages.
Contacts with the fields you need
Custom fields, tags, multiple addresses, saved views. Activity timeline shows every SMS, call, email, note, task — chronological, across all your devices.
Pipeline that's just a kanban
Drag-drop, multiple pipelines, custom stages, values that roll up. Move a deal by dragging it. No five-step modal, no required fields.
Bulk SMS without the markup
Real two-way threads, scheduled send, bulk SMS with throttle + opt-out, templates with merge tags, MMS. Sent through YOUR Twilio number at Twilio's rate — we don't see it.
Softphone + voicemail drops
WebRTC softphone in every app — make and receive calls anywhere you're signed in. Pre-record your voicemail drop, hit one button mid-call to leave it, hang up while it plays.
Email + SMS campaigns with real analytics
One-off blasts or multi-step drips. Real open and click rates pulled from Resend. Audience filters use your own tags. A/B testing, exit-on-reply, automatic suppression on unsubscribe.
Tasks, events, recurring work
One calendar for tasks, events, and appointments. Recurring tasks for the monthly check-ins you'd otherwise forget. Overdue items pinned to the top — you can't miss them.
Plus: workflows, webhooks, booking links, AI assistant via the Model Context Protocol, full data export anytime, daily backups. See full feature list →
Web, Windows, and Android.
Sign up on the web. Install the native apps any time after — same login, real-time sync across all three.
Your CRM in your pocket. Real-time sync, full feature parity.
Native Android app with the full softphone, SMS, contacts, deals, and tasks. iOS works through Safari with Add to Home Screen (native iOS coming after Android stabilises in production).
- WebRTC voice calls in either direction
- SMS threads with read state synced live to desktop and web
- Contact + deal CRUD, tags, notes — same data, any surface
- Sign in with the same credentials as web; signup only happens once on app.groundbasecrm.com
We distribute by APK (not Google Play) to avoid Play's 30% commission on in-app purchases. That's how we keep the price flat at $9.
Drive your CRM from Claude, ChatGPT, or Cursor.
Groundbase ships with a built-in MCP (Model Context Protocol) server. Point your MCP-aware client at it and your AI can read and write the entire CRM — contacts, deals, campaigns, workflows — in plain English. Bring your own model. We don't care which one.
- →“Find every trial signup from last month who hasn't logged in this week and queue a check-in email.” Done. AI runs the query, drafts the messages, you review and send.
- →“What deals are at risk this month?” AI scans your pipeline, identifies stalled deals by stage age, tells you who to follow up with first.
- →“Draft a re-engagement drip for trials that expired without converting.” Subject lines, body copy, audience filter, schedule — built as a draft you review before sending.
Works with any MCP-compatible client — Claude Desktop, ChatGPT Desktop, Cursor, your own agent. Your CRM, your AI key, no lock-in. MCP setup guide →
BYO Twilio. BYO Resend. We stay out of the way.
Reselling comms would mean marking you up 30–50% to cover overhead and risk. Instead you connect Twilio and Resend with your own keys, pay them direct at their published rates, and we don't see a cent of usage. Your numbers, your domain, your data. Take it all with you any time.
Twilio — SMS + voice
Sign up at twilio.com, buy a number (~$1/month), paste your Account SID + Auth Token. Twilio charges ~$0.0083 per SMS and $0.013/min for voice — billed straight to your Twilio account, not ours.
Resend — email campaigns
Free tier covers 3,000 emails/month. Sign up at resend.com, verify your sending domain, paste your API key. Resend handles deliverability; Groundbase handles the editor + schedule + tracking.
AI — Claude, OpenAI, your model
Optional. Plug any MCP-compatible client into Groundbase and your AI can drive the whole CRM. Anthropic, OpenAI, or whatever you self-host. We don't proxy AI calls; your key, your usage, your bill.
BYO isn't for everyone, and that's deliberate. If you're comfortable creating a Twilio account and pasting an API key, you're our customer. If you want someone to manage that for you, you'll be happier paying $80–$200/mo on a different tool.
One price. Everything included.
No tiers, no per-user pricing, no upsells.
Billed monthly via Stripe · 14-day free trial · cancel anytime
- ✓Unlimited contacts, deals, tasks, notes
- ✓SMS + voice through your own Twilio (you pay Twilio direct, no markup)
- ✓Email campaigns + drips through your own Resend
- ✓Workflows, sequences, webhooks, AI assistant via MCP
- ✓Voicemail drops — record once, drop mid-call
- ✓Web + Windows desktop + Android mobile, real-time sync
- ✓Two-factor authentication, full data export
Phone verification required at signup (one trial per phone). Twilio Verify SMS — standard rates apply.
Want to see if it's worth $9? Read the full feature breakdown →
One developer. No VC. No bullshit pricing tiers.
Groundbase exists because every other CRM was charging me twice — once for the seat, again for the messages they were already sending through Twilio anyway. The whole point of this product is a straight line between “sign up” and “send the message” with no middleman in the middle.
BYO is the unlock. You connect Twilio, Resend, and your AI key directly, and you keep ownership of the whole stack — your numbers, your domain, your data, your usage bills. If you ever leave, you take all of it with you. That's the deal, in writing, and it's why we can stay at $9 forever.
Stack: Cloudflare Workers + Turso (libSQL) + Electron + React Native. Built in public, mostly with Claude.
The honest FAQ
What does $9/month actually get me?+
Who is this NOT for?+
Why bring-your-own?+
Why do you require a phone number at signup?+
What happens if my payment fails?+
Mac? iOS?+
Can I cancel?+
Can I export my data?+
More questions? Browse the help docs or email support.
Try it free for 14 days.
Card required, not charged until day 15. Cancel from Settings any time before then with one click. No phone number lock-in — bring your Twilio when you're ready.
Start free trial →