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Efficy (former SumaCRM) — duplicate entry. SumaCRM was acquired and merged into Efficy. See Efficy listing for the full review.
Efficy is best for small European businesses that need a solid CRM with room to grow. It offers a flexible set of contact and deal management tools, but pricing can get complicated and it's not as well-known or supported in the US market as competitors like HubSpot or Zoho. If you're based in the US, you'll likely find better-supported options at a similar price.