主流云服务商 Major Cloud Providers

• App Engine - 28 frontend instance hours per day, nine backend instance hours per day
• Cloud Firestore - 1GB storage, 50,000 reads, 20,000 writes, 20,000 deletes per day
• Compute Engine - 1 non-preemptible e2-micro, 30GB HDD, 5GB snapshot storage (restricted to certain regions), 1 GB network egress from North America to all region destinations (excluding China and Australia) per month
• Cloud Storage - 5GB, 1GB network egress
• Cloud Shell - Web-based Linux shell/primary IDE with 5GB of persistent storage. 60-hour limit per week
• Cloud Pub/Sub - 10GB of messages per month
• Cloud Functions - 2 million invocations per month (includes both background and HTTP invocations)
• Cloud Run - 2 million requests per month, 360,000 GB-seconds memory, 180,000 vCPU-seconds of compute time, 1 GB network egress from North America per month
• Google Kubernetes Engine - No cluster management fee for one zonal cluster. Each user node is charged at standard Compute Engine pricing
• BigQuery - 1 TB of querying per month, 10 GB of storage each month
• Cloud Build - 120 build-minutes per day
• Google Colab — Free Jupyter Notebooks development environment.
• Kaggle — Jupyter Notebooks with 4 CPU cores and 30 GB RAM computational environment without any weekly usage limits. With Phone number verification, 1 Nvidia Tesla P100 GPU or 2x Nvidia Tesla T4 GPU can be added with a usage limit of 30 GPU hours/week for free. With Identity verification - 1 TPU v3-8 with 96 CPU cores and 330 GB RAM is available with a usage limit of 20 hours/week for free. Check Technical Specifications for more details.
• ChromeRemoteDesktop — Free remote desktop app with practically no limit on the number of devices, owned by Google, so needs a Google account.
• Google AI Studio — Get free access to Gemini 3.5 Flash, Gemini 3 Flash and Gemma 4 models. The free tier for Flash offers 5 requests per minute, 20 requests per day, and 250k input tokens per minute. Meanwhile the free tier for Gemma 4 offers 30 requests per minute, 14.4k requests per day, but (only) 16k input tokens per minute.
• Full, detailed list - https://cloud.google.com/free

• CloudFront — 1TB egress/month, 10M HTTP requests, and 2M Function invocations/month
• CloudWatch — 10 custom metrics and alarms, 1M API requests, 5GB of log data ingestion and 5GB of log data archive
• CodeBuild — 100min of build time/month
• CodeCommit — 5 active users, 5k repositories/account, 50GB storage/month and 10K requests/month
• CodePipeline — 1 active pipeline/month
• DynamoDB — 25GB NoSQL DB
• Lambda — 1 million requests/month
• SNS — 1 million publishes/month
• SES — 3.000 messages/month (6mo)
• SQS — 1 million messaging queue requests
• Full, detailed list - https://aws.amazon.com/free/

• App Service — 10 web, mobile, or API apps (60 CPU minutes/day)
• Functions — 1 million requests per month
• DevTest Labs — Enable fast, easy, and lean dev-test environments
• Active Directory — 500,000 objects
• Active Directory B2C — 50,000 monthly stored users
• Azure DevOps — 5 active users, unlimited private Git repos
• Azure Pipelines — 10 free parallel jobs with unlimited minutes for open source for Linux, macOS, and Windows
• Microsoft IoT Hub — 8,000 messages per day
• Load Balancer — 750 hours, 15GB data processing and 5 rules (12mo)
• Notification Hubs — 1 million push notifications
• Bandwidth — 15GB Outbound(12mo)
• Cosmos DB — 25GB storage and 1000 RUs of provisioned throughput
• Static Web Apps — Build, deploy, and host static apps and serverless functions with free SSL, Authentication/Authorization, and custom domains
• Storage — 100GB LRS transactions (Azure Files), 5GB Blob storage, 10GB LRS Archive Storage, 2x64GB SSD (12mo)
• Cognitive Services — AI/ML APIs (Computer Vision, Translator, Face detection, Bots, etc) with free tier including limited transactions
• Cognitive Search — AI-based search and indexation service, free for 10,000 documents
• Azure Kubernetes Service — Managed Kubernetes service, free cluster management
• Event Grid — 100K ops/month
• Service Bus — 750 hours and 13 million operations Standard tier base unit (12mo)
• Full, detailed list - https://azure.microsoft.com/free/

• Compute
• 2 AMD-based Compute VMs with 1/8 OCPU and 1 GB memory each
• 2 Arm-based Ampere A1 cores and 12 GB of memory usable as one VM or up to 2 VMs
• Instances will be reclaimed when deemed idle
• Block Volume - 2 volumes, 200 GB total (used for compute)
• Object Storage - 10 GB
• Load balancer - 1 instance with 10 Mbps
• Databases - 2 DBs, 20 GB each
• Monitoring - 500 million ingestion data points, 1 billion retrieval datapoints
• Bandwidth - 10 TB egress per month, speed limited to 50 Mbps on x64-based VM, 500 Mbps * core count on ARM-based VM
• Public IP - 2 IPv4 for VMs, 1 IPv4 for load balancer
• Notifications - 1 million delivery options per month, 1000 emails sent per month
• Full, detailed list - https://www.oracle.com/cloud/free/

• Cloudant database - 1 GB of data storage
• Db2 database - 100MB of data storage
• API Connect - 50,000 API calls per month
• Availability Monitoring - 3 million data points per month
• Log Analysis - 500MB of daily log
• Full, detailed list - https://www.ibm.com/cloud/free/

• Application Services — Free DNS for an unlimited number of domains, DDoS Protection, CDN along with free SSL, Firewall rules and page rules, WAF, Bot Mitigation, Free Unmetered Rate Limiting - 1 rule per domain, Analytics, Email forwarding
• Zero Trust & SASE — Up to 50 Users, 24 hours of activity logging, three network locations
• Cloudflare Tunnel — You can expose locally running HTTP port over a tunnel to a random subdomain on trycloudflare.com use Quick Tunnels, No account required. More features (TCP tunnel, Load balancing, VPN) in Zero Trust Free Plan.
• Workers — Deploy serverless code for free on Cloudflare's global network-100k daily requests.
• Workers KV — 100k read requests per day, 1000 write requests per day, 1000 delete requests per day, 1000 list requests per day, 1 GB stored data
• R2 — 10 GB per month, 1 million Class A operations per month, 10 million Class B operations per month
• D1 — 5 million rows read per day, 100k rows written per day, 1 GB storage
• Pages — Develop and deploy your web apps on Cloudflare's fast, secure global network. Five hundred monthly builds, 100 custom domains, Integrated SSL, unlimited accessible seats, unlimited preview deployments, and full-stack capability via Cloudflare Workers integration.
• Queues — 1 million operations per month
• TURN — 1TB of free (outgoing) traffic per month.

Started as an e-mail provider but now provides a suite of services, some of which have free plans. List of services having free plans :

• Catalyst by Zoho — PaaS/full-stack cloud platform with a generous free tier
• Zoho Apptics — Unified and actionable product analytics to monitor performance, analyze user behavior and collect feedback for mobile, web, and desktop apps with generous Free Forever plan.
• Email Free for 5 users. 5GB/user & 25 MB attachment limit, one domain.
• Zoho Assist — Zoho Assist's forever free plan includes one concurrent remote support license and Access to 5 unattended computer licenses for unlimited duration available for both professional and personnel use.
• Sprints Free for 5 users,5 Projects & 500MB storage.
• Docs — Free for 5 users with 1 GB upload limit & 5GB storage. Zoho Office Suite (Writer, Sheets & Show) comes bundled.
• Projects — Free for 3 users, 2 projects & 10 MB attachment limit. The same plan applies to Bugtracker.
• Connect — Team Collaboration free for 25 users with three groups, three custom apps, 3 Boards, 3 Manuals, and 10 Integrations along with channels, events & forums.
• Meeting — Meetings with upto 3 meeting participants & 10 Webinar attendees.
• Vault — Password Management is accessible for Individuals.
• Showtime — Yet another Meeting software for training for a remote session of up to 5 attendees.
• Notebook — A free alternative to Evernote.
• Wiki — Free for three users with 50 MB storage, unlimited pages, zip backups, RSS & Atom feed, access controls & customizable CSS.
• Subscriptions — Recurring Billing management free for 20 customers/subscriptions & 1 user with all the payment hosting done by Zoho. The last 40 subscription metrics are stored
• Checkout — Product Billing management with 3 pages & up to 50 payments.
• Desk — Customer Support management with three agents, private knowledge base, and email tickets. Integrates with Assist for one remote technician & 5 unattended computers.
• Cliq — Team chat software with 100 GB storage, unlimited users, 100 users per channel & SSO.
• Campaigns — Email Marketing
• Forms — Form Creator
• Sign — Paperless Signatures
• Surveys — Online Surveys
• Bookings — Appointment Scheduling