The verdict
If your deals involve a buying committee and you need to see who has engaged, I'd pick GetAccept. If the proposal itself is where deals stall, and you use HubSpot, Zoho CRM or Pipedrive, I'd pick Qwilr.
Both ask for commitment at the higher end. GetAccept's Professional plan needs an annual agreement and at least five users. Qwilr's Growth and Scale plans are annual only with minimum seat counts, and API access runs on credits. Neither suits someone sending a few simple quotes. Price the plan that has your CRM before you book a demo, and build the same real proposal in both.