Decalyst vs GitHub Copilot
GitHub Copilot is Microsoft-backed, per-seat ($10/$19/$39 tier depending on plan), deeply woven into VS Code, JetBrains IDEs, and GitHub UI. No credit system, no BYOK for most users, runs on Azure-hosted models. Best for teams already in the GitHub/Microsoft ecosystem.
Pick Decalyst if:
You want security scanning on every diff, flexible credit billing, or multi-IDE support without vendor lock-in.
Pick GitHub Copilot if:
Your team is GitHub-native, you want tight repo/PR/issue integration, and prefer Microsoft infrastructure.
| Dimension | Decalyst | GitHub Copilot |
|---|---|---|
| Pricing model | Credits, $1 buys 500 credits, no feature gates | Per-seat subscription, $10 (Individual), $19 (Business), $39 (Enterprise) |
| BYOK LLM keys | Yes, zero markup on every tier | No general BYOK as of 2025; uses Microsoft-hosted models only |
| Local model support | Embeddings local, generation hosted on DigitalOcean inference | Azure-hosted models only, no local inference option |
| Security scan on every diff | Yes, 20-point scanner included on Free | Code Security features available but separate from chat/autocomplete |
| IDE depth | Native desktop (Tauri 2 + Monaco) | Deep VS Code and JetBrains integration, Copilot Workspace for GitHub.dev |
| Agent specialization | 9 named agents (Dispatch, Echo, Lens, Chuck, Scout, Nova, Forge, Hawk, Pixel) | Copilot Chat, Edits, and Workspace agents, tightly integrated with GitHub context |
| Telemetry | Opt-in only | Telemetry enabled by default (some settings available for Enterprise) |
| When to pick | Multi-IDE flexibility, security-first, per-request billing without seat locks | GitHub-native workflows, tight PR/issue integration, Enterprise compliance |
Pricing
Copilot is per-seat subscription: $10/mo for individuals, $19/mo for Business (org management), $39/mo for Enterprise (compliance/audit). There is no credit system or usage-based tier. Decalyst uses credits (500 per $1), so small teams and soloists benefit from fine-grained billing without forcing a per-seat commitment.
BYOK and key handling
Copilot does not offer general BYOK; you are locked to Microsoft-hosted Claude, GPT-4o, or other Microsoft-approved models. Decalyst supports BYOK on every tier with zero markup, letting you bring your own Anthropic, OpenAI, or other keys without surcharge. For enterprises with key compliance rules, Decalyst is more flexible.
Local vs hosted models
Copilot runs exclusively on Azure-hosted models managed by Microsoft. Decalyst runs embeddings locally and generation on DigitalOcean inference, giving you more control over where your code goes. Neither supports private on-device models like Ollama for the main agent, though Cline and Aider do.
Security review on every diff
Copilot has separate Code Security features, but they are not bundled into the main chat/autocomplete agent. Decalyst includes a 20-point security scanner on every diff across all tiers, automatically catching injection, XSS, secrets, and more before merge.
IDE depth and architecture
Copilot is deeply embedded in VS Code, JetBrains, and GitHub.dev (Workspace), with tight repo/PR/issue context. Decalyst is a native desktop app with fresh architecture and flexibility across platforms. If you live in GitHub and VS Code, Copilot is more integrated; if you use many editors or want a standalone app, Decalyst is more portable.
Telemetry and privacy posture
Copilot collects telemetry by default, with some Enterprise tuning available. Decalyst is opt-in only: no telemetry without your consent. Both are commercial; review Microsoft and Decalyst privacy policies for third-party sharing and retention terms.
When to pick which
Pick Copilot if your team is GitHub-native and wants native IDE integration. Pick Decalyst for flexible billing, always-on security scanning, multi-IDE support, and more control over model selection and key handling.