Record and contact volume
This limit grows quietly and arrives all at once. It is the right constraint to accept if your pipeline is small and valuable, and the wrong one if you handle large inbound volume, because volume accumulates whether or not it converts. Estimate how many records you add monthly and divide the allowance by it. That figure, in months, is your runway on this plan.
Seat count
A seat limit is the most predictable of the five, which makes it the easiest to plan around. The question to ask is not whether it is enough today but whether it is enough for the people who should be participating. Teams frequently keep half the sales function outside the CRM to stay within a free seat allowance, which defeats the purpose entirely, because a pipeline that only reflects some of the activity is worse than no pipeline at all.
Feature gating
This is the limit that most often forces the decision, and the one buyers examine least. List the five things your team must do every day, then check each one against the free tier specifically rather than against the product as a whole. If automation, sequences, call recording or reporting sit behind the paid line and you need them daily, the free plan is a trial rather than a home, and it is better to know that in week one.
Usage metering
Metered plans count something: emails sent, automation runs, calls made, records enriched. Metering is fair but it makes cost unpredictable at exactly the moment you succeed, because a good month uses more of everything. If a candidate meters something central to your work, ask what happens when you exceed the allowance, whether it stops or charges, and what the overage looks like.
Support level
Free tiers usually carry community or documentation-based support, which is entirely reasonable and worth knowing about in advance. Test it during your first fortnight by raising a genuine question and seeing what comes back and how quickly. If your business would be materially affected by two days without an answer, factor that into the decision rather than discovering it during an outage.