Alternativas ao Apisearch para Software as a Service (SaaS) com licença de código aberto

• Software as a Service (SaaS)
  Todas as plataformas Windows Mac Linux Android Android Tablet Web Self-Hosted Software as a Service (SaaS) BSD Wordpress Java Node.JS Squarespace Microsoft Azure HubSpot elasticsearch Heroku Jimdo
• Licença Open Source
  Qualquer licença Licença gratuita Licença Open Source Licença comercial