Every CRM demo shows a slide with 500 integration logos. In practice, most SMBs need about ten. The rest are distraction. Below are the ten integrations that reliably pay back inside 30 days for almost any service or local business — and the specific reason each one matters.

1. Google / Outlook Calendar

Non-negotiable. If your CRM can't book directly into the provider's real calendar with two-way sync, the whole appointment-booking motion collapses into a coordination mess. Bonus: enable "buffer time" and "avoid double-booking" on the calendar side. Before connecting it, map the rules in our appointment booking automation guide and compare them with the Legion booking workflow.

2. Stripe or Square for payments

Not just for accepting payments — the value is that "payment received" becomes a CRM trigger. Closed-won automations, onboarding sequences, and referral requests all key off this event.

3. Twilio (or built-in) for SMS and voice

If SMS or AI voice isn't native to your CRM, Twilio is the standard integration. Watch out for double billing — some CRMs mark up Twilio 3–5×.

4. Meta Ads & Google Ads lead forms

Native lead form connectors let a form submission become a CRM contact in under 60 seconds. Zapier as a fallback works, but adds latency — enough to move a lead out of the 5-minute conversion window.

5. Instagram & Facebook DMs

A DM is a lead in 2026. Piping DM conversations into the CRM (with the full transcript attached) means you can nurture cross-channel.

6. Google Business Profile for reviews

The single fastest way to increase inbound lead quality is more 5-star reviews. Automating the review request from a job-complete trigger is table stakes.

7. QuickBooks or Xero

Deal-to-invoice automation, plus revenue reporting sanity. Also lets you filter CRM reporting by paid vs. invoiced vs. overdue.

8. Industry-specific system of record

Every industry has one:

Home services: Jobber, ServiceTitan, Housecall Pro.
Fitness/wellness: MindBody, Wellness Living.
Medspa: Aesthetic Record, PatientNow.
Real estate: MLS + follow-up boss / kvCORE.

Two-way sync with the industry system is what stops "leads live in the CRM, patients live in the EMR."

9. Zapier or Make for the long tail

For the 10–15 tools that don't justify a native integration. Keep it simple; every Zap is a potential silent failure point.

10. Slack (or Teams) for internal alerts

High-intent lead → channel ping. Missed call → channel ping. Won deal → channel ping. Sales culture is built on visible momentum.

The rule of installation order

Install in this order: calendar → phone/SMS → lead-form connectors → payments → reviews → industry system → the rest. Any deviation and you'll spend two weeks debugging the wrong thing first.

Want to see it live? Book a 30-min Legion AI demo.

The 10 CRM Integrations Every SMB Should Set Up First