coost remains open source. Commercial support is available for teams using coost in production or needing in-depth support such as cross-platform adaptation, coroutine hooks, performance optimization, and team training, helping reduce risk and save time.
If you are not sure whether paid support is needed, you can request a free initial diagnosis first.
#Service Philosophy
- coost itself remains open source. Commercial support does not affect the open-source license.
- What you pay for is time, certainty, and risk reduction, not the code itself.
- Diagnose first, then quote. Requirements and boundaries are clarified as early as possible.
- Remote support is the default. On-site support is negotiated separately.
- The prices below are reference ranges. The final quote depends on assessment.
#Scope of Services
- Custom development: architecture adaptation (RISC-V / MIPS / Windows ARM64, etc.), coroutine hooks, performance optimization, custom features
- coost usage training, technical consulting, and technical training
- Annual technical support with priority response
- Troubleshooting and resolution of complex technical issues
#Service Packages
| ID | Package | Use Case | Typical Duration | Reference Price |
|---|---|---|---|---|
| CS-00 | Free Diagnosis | Identify scope before committing | 30 min | Free |
| CS-01 | Technical Consulting | Architecture, debugging, code review | Per hour | 800–1,500 CNY/hour, 1 hour minimum |
| CS-02 | Custom Development | Architecture adaptation, coroutine hooks, performance optimization, custom features | Per project | From 10k–50k CNY; complex projects at 3,000–6,000 CNY/man-day |
| CS-03 | Team Training | Get a team up to speed with coost | 1–3 days | 8k–30k CNY/day |
| CS-04 | Annual Support | Long-term production use | 1 year | 30k–100k CNY/year |
| CS-05 | Emergency Rescue | Production incidents, release blockers | Per case | From 5,000 CNY/case |
#Package Details
#CS-00 Free Diagnosis
Who It’s For: Teams already using or planning to use coost but unsure whether paid support is needed.
Deliverables:
- 30-minute online meeting
- Quick assessment of the issue type: adaptation, hooks, performance, architecture, usage
- Initial suggestions and possible options
- Follow-up package quote ranges if needed
What the Client Provides:
- Project background, target platform, coost version
- Issue description, logs, minimal reproduction (if possible)
- Expected timeline
Not Included:
- Code changes
- In-depth investigation
- Written report
- Long-term Q&A
#CS-01 Technical Consulting
Who It’s For:
- Architecture selection stage
- Specific compilation, linking, coroutine scheduling, or hook issues
- Code review or design review
- Guidance for a team to complete work independently
Deliverables:
- Online meeting or email/Issue consulting
- Problem analysis and proposed solutions
- Key code snippets or pseudocode
- Meeting minutes or conclusion summary
- Optional: PR review, design document review
Reference Price:
- 800–1,500 CNY/hour, 1 hour minimum
- Single session: 1,500 CNY (1-hour meeting + 30-minute preparation + brief summary)
- 5-hour package: 10% off
- 10-hour package: 20% off
- 20-hour package: 25% off
Not Included:
- Full feature development
- Production deployment
- 24×7 response
- Fixing bugs in third-party libraries themselves
#CS-02 Custom Development
Who It’s For:
- Need adaptation to RISC-V, MIPS, Windows ARM64, etc.
- Need to use third-party network libraries directly in coroutines (coroutine hooks)
- Need performance optimization: latency, throughput, or P99 not meeting targets
- Need custom coost features, private protocols, scheduling policies, monitoring interfaces, or toolchain integration
Sub-categories and Reference Prices:
| Sub-category | Content | Reference Price | Duration |
|---|---|---|---|
| Architecture Adaptation | Compilation, running, basic tests on RISC-V / MIPS, etc. | 10k–30k CNY | 1–4 weeks |
| Coroutine Hook Integration | Enable a specified third-party network library in coroutines | 20k–50k CNY | 3–6 weeks |
| Performance Optimization | Baseline testing, bottleneck analysis, tuning, re-testing | 10k–40k CNY | 1–4 weeks |
| Custom Features | Custom feature development for coost | 3,000–6,000 CNY/man-day, from 20k CNY | Per requirements |
Deliverables:
- Requirement confirmation and technical design
- Code patches or modules
- Test cases, examples, documentation
- Optional: upstream PR
Acceptance Criteria:
- Acceptance based on mutually confirmed requirements and test cases
- Architecture adaptation: compiles and runs on target platform
- Coroutine hooks: specified library connects, requests, and responds in coroutines; timeout and cancellation work as expected
- Performance optimization: re-tested in the same environment and meets agreed baseline
- Custom features: accepted per requirements document
Not Included:
- Third-party commercial licenses
- Hardware, cloud resources, travel
- Large-scale refactoring of client business code
- Long-term free maintenance
- Scope creep
#CS-03 Team Training
Who It’s For:
- New teams adopting coost
- Upgrading from v3 to v4.0.0
- Internal technical sharing
- Training on coroutines, network programming, or performance tuning
Available Formats:
| Format | Content | Reference Price |
|---|---|---|
| Online Training | 2–4 hours per session | 8k–15k CNY/day |
| On-site Training | 1–3 days | 15k–30k CNY/day |
| Customized In-house Training | Course designed per requirements | Negotiable |
Optional Training Topics:
- coost architecture and core components
- Coroutine principles and scheduling
- Network programming and hooks
- Cross-platform compilation and adaptation
- Performance analysis and optimization
- Migration from v3 to v4.0.0
Not Included:
- Travel, accommodation, venue
- Long-term free Q&A after training
- Client business code development
#CS-04 Annual Support
Who It’s For:
- Teams already using coost in production
- Need stable upgrades, security notifications, and priority response
- Prefer not to quote each issue separately
Suggested Tiers:
| Tier | Included | Reference Price |
|---|---|---|
| Basic | Priority email/Issue support, 24h response on business days, 10 consulting hours | 30k–50k CNY/year |
| Standard | 8h response on business days, 20 consulting hours, quarterly meetings | 50k–80k CNY/year |
| Advanced | 4h response on business days, 50 consulting hours, monthly meetings, upgrade support | 80k–100k CNY/year |
Deliverables:
- Priority Issue / email support
- Version upgrade advice
- Security vulnerability notifications
- Quarterly/monthly technical meetings
- A certain number of consulting hours or minor fixes
- Emergency coordination
Not Included:
- 24×7 support
- New feature custom development
- On-site support
- Third-party library responsibility
#CS-05 Emergency Rescue
Who It’s For:
- Production crashes, hangs, or sudden performance drops
- Imminent release windows
- Need for rapid diagnosis and mitigation
Deliverables:
- Remote emergency access
- Problem diagnosis
- Temporary fix or workaround
- Brief post-mortem report
Reference Price:
- From 5,000 CNY/case
- After the first 2 hours, 1,500–2,500 CNY/hour
- 50%–100% surcharge for nights or holidays
Not Included:
- On-site support
- Hardware/network/cloud provider issues
- Long-term root-cause development
#Service Process
- Free diagnosis
- Clarify requirements and boundaries
- Provide quote and timeline
- Sign contract or confirm by email
- Pay advance payment
- Execute service
- Acceptance and delivery
- Final payment and after-sales
#Payment Terms
- Consulting/Training: 100% or 50% advance
- Custom Development: 50% advance, 50% after acceptance
- Annual Support: annual payment; quarterly payment negotiable
- Emergency Rescue: advance or within 24 hours
- Overtime billed hourly
- Travel expenses reimbursed at cost
#What the Client Provides
- Clear requirements
- Reproducible environment
- Logs, code, access permissions
- Designated contact person
- Timely feedback
#Exclusions
- Client business logic development
- Third-party library licensing and bug fixes
- Hardware, cloud resources, travel
- 24×7 unconditional support
- Unlimited requirement changes
#Intellectual Property and Confidentiality
- coost itself remains under its original open-source license.
- Client proprietary code remains with the client.
- Custom development deliverables are defined by contract.
- General improvements may be contributed upstream by mutual agreement.
- Both parties may sign an NDA.
#FAQ
#Does commercial support affect coost’s open-source nature?
No. coost remains open source. Commercial support covers custom development, adaptation, optimization, training, and other in-depth services.
#Can I purchase consulting by the hour only?
Yes. Technical consulting starts at 1 hour and is billed hourly.
#Can we sign an NDA?
Yes. Specific terms are negotiable.
#Is remote support available?
Remote support is the default. On-site support is negotiable with travel and expenses.
#Can you provide invoices?
Negotiable. Taxes are charged separately based on actual rates.
#Can you guarantee a specific performance improvement?
We can agree on baseline metrics before the service and re-test in the same environment. We cannot guarantee numbers directly tied to business revenue.
#Are you responsible for third-party library issues?
We are not directly responsible for issues in third-party libraries, but we can assist with diagnosis, workarounds, or integration.
#What are the response times?
Depending on the package, Annual Support provides 24h / 8h / 4h response on business days. Emergency Rescue is negotiated per case.
#Contact
Please reach out with a brief description of your project and issue:
- GitHub Issues: https://github.com/idealvin/coost/issues
- Email: idealvin@qq.com
A free initial diagnosis is available to assess scope and feasibility.