Yes.
You need a simple CRM.
Why
You've described an account management business, not a deal-flow business. Your sales are either too fast or too slow for a pipeline to be meaningful, and you've already named the real job: "see what they are working on and whether they are keeping in touch with customers" plus logging calls and meeting actions. With 4-10 reps visiting the same plants repeatedly, the unit of work is the *contact touch*, not the *deal stage*. Outlook integration is non-negotiable because that's where the relationship already lives.
What you actually need
- Pipedrive Essential (~$15 USD/user/mo) with the Activities + Contacts view as the home screen — has a proper Outlook email + calendar two-way sync, call logging, and meeting notes per contact. Hide the pipeline view from your reps; pin "Activities" instead. You as manager get a team activity report showing who's contacted whom and when.
- A "last contacted" custom field on every key account — sort by oldest first. This is the single view that answers your question "are they keeping in touch".
- A habit — the Monday account review — 20 minutes with your reps, filter contacts where "last activity > 60 days" on active plants, assign next visit. This is the meeting your CRM exists to enable.
Do this today
Start a Pipedrive trial at pipedrive.com, connect Outlook under Personal Preferences → Email Sync and Calendar Sync, then import your customer list as Organizations with contacts under each. Add one custom Activity Type called "Plant Visit" alongside Call / Meeting / Email. By tomorrow your reps can log a site visit in two clicks and you can pull a report of every touch across the team this week.
What to ignore
Skip HubSpot Sales Hub Professional and Salesforce — both will be pitched to you because of your B2B industrial profile, and both will drown your reps in pipeline fields they'll refuse to fill in. Also ignore anyone selling you Apollo, ZoomInfo, or Outreach; those are outbound prospecting tools and you're a relationship/account business. Don't touch Pipedrive's Advanced or Professional tiers yet — Essential covers everything you described.
What doing nothing costs you
With 10-50 inquiries/month routed through individual reps' Outlook inboxes and no shared view, you'll keep losing breakdown orders to whichever competitor answered first and 6-12 month upgrade projects to whichever rep happened to remember. The compounding cost isn't a lost lead — it's a plant relationship quietly going cold for 90 days before you notice.
When to revisit this
When a rep leaves and you realise their account history walked out the door with their Outlook profile — that's the moment to enforce activity logging as non-optional.