Cloudflare Workers
Cloudflare Workers offers a free service that includes 100,000 requests per day across all Worker scripts, deployment of up to 100 Worker scripts, a free workers.dev subdomain, and up to 10ms of CPU time per request.
Render
Render offers free services such as free instances for web services, Redis instances, and PostgreSQL databases, with usage limits designed for exploring new technologies, personal projects, and experiencing Render's developer platform.
Netlify
Netlify offers a free service that provides a single member seat, a global edge network, live site previews with collaboration UI, 100GB bandwidth, 300 build minutes, instant rollbacks, static assets, and dynamic serverless functions.