具有商业许可证的Software as a Service (SaaS)版sevDesk的替代方案

• Software as a Service (SaaS)
  所有平台 Windows Mac Linux Android iPhone Windows Phone Apple Watch iPad Android Tablet Kindle Fire Web Self-Hosted Software as a Service (SaaS) PHP BSD Slack npm
• 商业牌照
  任何牌照 免费许可证 开源许可证 商业牌照