# Darwa Blog

> Darwa is an AI-native cloud application platform for web hosting, web services, Frontend Cloud, AI agents, databases, cloud storage, and business email.

Language: English (en)
Index: https://darwa-front.darwa.co/blog/en
Articles: 12

Every article below is available as raw Markdown at its `.../markdown` URL.

## Articles

### Web Service regions, plan upgrades, autoscaling, and billing

- URL: https://darwa-front.darwa.co/blog/en/web-service-regions-plan-upgrades-autoscaling-billing
- Markdown: https://darwa-front.darwa.co/blog/en/web-service-regions-plan-upgrades-autoscaling-billing/markdown
- Summary: A practical guide to primary regions, regional shards, automatic Git deployments, plan upgrades, proration, autoscaling, and payment recovery in Darwa.
- Category: Platform Guides (https://darwa-front.darwa.co/blog/en/category/platform-guides)
- Tags: web service, multi-region, autoscaling, cloud billing
- Author: Darwa Engineering — Platform team
- Published: 2026-08-31T09:00:00Z
- Updated: 2026-09-04T12:41:19.400329Z
- Reading time: 3 minutes (465 words)
- Translations: ar: https://darwa-front.darwa.co/blog/ar/dalil-manatiq-web-service-tawassu-fawtara | de: https://darwa-front.darwa.co/blog/de/web-service-regionen-autoscaling-abrechnung | es: https://darwa-front.darwa.co/blog/es/regiones-web-escalado-facturacion-darwa | fr: https://darwa-front.darwa.co/blog/fr/regions-web-service-autoscaling-facturation | hi: https://darwa-front.darwa.co/blog/hi/web-service-region-autoscaling-billing-guide | ja: https://darwa-front.darwa.co/blog/ja/web-service-region-autoscaling-billing-guide-ja | pt: https://darwa-front.darwa.co/blog/pt/regioes-web-service-autoscaling-faturamento | ru: https://darwa-front.darwa.co/blog/ru/regiony-web-service-avtomasshtabirovanie-oplata | zh: https://darwa-front.darwa.co/blog/zh/web-service-quyu-kuorong-jifei-zhinan

**Questions answered in this article:**

- **Can I change the primary Web Service region?** No. The primary region is locked after creation. Add a regional shard for another active location.
- **How is a plan upgrade charged mid-month?** Darwa estimates and Stripe invoices only the upgrade difference for the remaining current billing period; the new monthly total starts at renewal.
- **Does enabling Capacity Autopilot charge me?** No. Billing starts only while temporary capacity is active and stops when pressure falls, subject to the policy limit.

### How to Deploy a FastAPI Application from GitHub

- URL: https://darwa-front.darwa.co/blog/en/how-to-deploy-a-fastapi-application-from-github
- Markdown: https://darwa-front.darwa.co/blog/en/how-to-deploy-a-fastapi-application-from-github/markdown
- Summary: A production FastAPI release needs a pinned Python version, repeatable dependency install, an explicit ASGI start command, environment values, and a lightweight health route.
- Category: Application Hosting (https://darwa-front.darwa.co/blog/en/category/application-hosting)
- Tags: fastapi, github deploy
- Author: Darwa Engineering — Platform team
- Published: 2026-08-28T05:10:00Z
- Updated: 2026-08-31T19:34:34.240722Z
- Reading time: 4 minutes (880 words)

**Questions answered in this article:**

- **What command should start a FastAPI application?** A common command is uvicorn app.main:app --host 0.0.0.0 --port $PORT, adjusted for the application's import path.
- **Should database migrations run in the web start command?** No. Run migrations as one controlled release task so replicas do not race and migration failure does not repeatedly restart the web process.
- **Can FastAPI uploads be stored on the application filesystem?** Treat the runtime filesystem as replaceable unless persistent storage is explicitly attached. Durable uploads should normally use object storage.

### AI Agent Architecture: Tools, State, Approvals, and Safe Execution

- URL: https://darwa-front.darwa.co/blog/en/ai-agent-architecture-tools-state-approvals
- Markdown: https://darwa-front.darwa.co/blog/en/ai-agent-architecture-tools-state-approvals/markdown
- Summary: A practical architecture for agents that call real tools: narrow capabilities, durable state, explicit approvals, idempotent execution, and measurable outcomes.
- Category: AI Agents (https://darwa-front.darwa.co/blog/en/category/ai-agents)
- Tags: ai agents, tool calling, human approval, agent architecture
- Author: Darwa Engineering — Platform team
- Published: 2026-08-28T07:00:00Z
- Updated: 2026-08-31T19:34:34.240722Z
- Reading time: 3 minutes (539 words)

**Questions answered in this article:**

- **What is the safest first tool for an AI agent?** Start with a read-only, narrowly scoped tool whose output can be verified and whose failure cannot change customer data.
- **When should an agent require human approval?** Require approval before payments, deletion, public communication, permission changes, or any action that is costly or difficult to reverse.
- **Does a better model remove the need for guardrails?** No. Authorization, input validation, spending limits, and audit logs belong in deterministic application code around the model.

### Next.js Static or Server Rendering? A Production Decision Guide

- URL: https://darwa-front.darwa.co/blog/en/nextjs-static-rendering-server-rendering-decision-guide
- Markdown: https://darwa-front.darwa.co/blog/en/nextjs-static-rendering-server-rendering-decision-guide/markdown
- Summary: Choose rendering per route by freshness, personalization, cacheability, and failure cost—then verify the result instead of labeling an entire Next.js project static or dynamic.
- Category: Frontend Cloud (https://darwa-front.darwa.co/blog/en/category/frontend-cloud)
- Tags: next.js, frontend hosting, static rendering, server rendering
- Author: Darwa Engineering — Platform team
- Published: 2026-08-28T06:53:00Z
- Updated: 2026-08-31T19:34:34.240722Z
- Reading time: 3 minutes (519 words)

**Questions answered in this article:**

- **Must one Next.js application use one rendering mode?** No. Choose per route: marketing pages can be static while authenticated or request-specific pages render dynamically.
- **Is server rendering always better for SEO?** No. Search engines need useful, accessible output; static generation often provides that with less runtime work and fewer failure points.
- **When should a route use revalidation?** Use revalidation when content can be briefly stale and many visitors can safely share the same cached representation.

### RAG vs AI Agents: When Do You Need Each?

- URL: https://darwa-front.darwa.co/blog/en/rag-vs-ai-agents-when-do-you-need-each
- Markdown: https://darwa-front.darwa.co/blog/en/rag-vs-ai-agents-when-do-you-need-each/markdown
- Summary: RAG retrieves relevant knowledge for an answer, while an agent can choose tools and take steps. Use retrieval alone when answering is the full job.
- Category: Agent Workflows (https://darwa-front.darwa.co/blog/en/category/agent-workflows)
- Tags: rag, ai agents
- Author: Darwa Engineering — Platform team
- Published: 2026-08-28T05:30:00Z
- Updated: 2026-08-31T19:34:34.240722Z
- Reading time: 4 minutes (690 words)

**Questions answered in this article:**

- **Is RAG the same as an AI agent?** No. RAG retrieves relevant knowledge for an answer; an agent chooses and coordinates actions over time.
- **Can an AI agent use RAG?** Yes. Retrieval can provide evidence that an agent uses while selecting or preparing an action.
- **Which should a team build first?** If the task is answering from private knowledge, begin with retrieval. Add agent behavior only when users need the system to choose among actions.

### How to Measure AI Agent Quality in Production

- URL: https://darwa-front.darwa.co/blog/en/how-to-measure-ai-agent-quality-in-production
- Markdown: https://darwa-front.darwa.co/blog/en/how-to-measure-ai-agent-quality-in-production/markdown
- Summary: Measure completed business outcomes, correctness, human corrections, latency, and total cost on a stable evaluation set before expanding autonomy.
- Category: Agent Workflows (https://darwa-front.darwa.co/blog/en/category/agent-workflows)
- Tags: agent evaluation, ai analytics
- Author: Darwa Engineering — Platform team
- Published: 2026-08-28T05:20:00Z
- Updated: 2026-08-31T19:34:34.240722Z
- Reading time: 4 minutes (709 words)

**Questions answered in this article:**

- **What is the best metric for AI agent quality?** Accepted-task rate is a strong primary metric, but it must be paired with critical failures, human rescue, latency, and cost per accepted result.
- **How many examples should an agent evaluation start with?** A carefully reviewed set of 30–100 representative and high-risk examples is often more useful than a large weak synthetic set.
- **Can a model grade another model's output?** Yes for calibrated, scalable judgment, but deterministic checks and periodic human audits are still needed, especially for high-impact failures.

### Top 10 AI Agent Tools to Evaluate in 2026

- URL: https://darwa-front.darwa.co/blog/en/top-10-ai-agent-tools-to-evaluate-in-2026
- Markdown: https://darwa-front.darwa.co/blog/en/top-10-ai-agent-tools-to-evaluate-in-2026/markdown
- Summary: This editorial shortlist compares ten actively documented agent tools by control model, integration style, deployment needs, observability, and the work a team must still own.
- Category: AI Tool Guides (https://darwa-front.darwa.co/blog/en/category/ai-tool-guides)
- Tags: AI agent tools, tool comparison
- Author: Darwa Engineering — Platform team
- Published: 2026-08-28T05:00:00Z
- Updated: 2026-08-31T19:34:34.240722Z
- Reading time: 4 minutes (856 words)

**Questions answered in this article:**

- **Which AI agent tool is best?** There is no universal winner. Choose from workflow state, team skills, integration model, observability, deployment needs, and exit requirements.
- **Should an agent use multiple specialist agents?** Usually not at first. Prove one agent plus deterministic code, then add roles only when evaluation data shows a measurable improvement.
- **What is the most important production test?** Interrupt a workflow around an external side effect, restart it, and verify that it resumes without losing state or duplicating the action.

### Top 10 Hosting Platforms for Developers in 2026

- URL: https://darwa-front.darwa.co/blog/en/top-10-hosting-platforms-for-developers-in-2026
- Markdown: https://darwa-front.darwa.co/blog/en/top-10-hosting-platforms-for-developers-in-2026/markdown
- Summary: This dated editorial shortlist compares ten developer platforms by workload fit, deployment experience, managed capabilities, observability, scaling, and portability—not one universal winner.
- Category: Hosting Comparisons (https://darwa-front.darwa.co/blog/en/category/hosting-comparisons)
- Tags: hosting platforms, developer hosting
- Author: Darwa Engineering — Platform team
- Published: 2026-08-28T04:50:00Z
- Updated: 2026-08-31T19:34:34.240722Z
- Reading time: 4 minutes (787 words)

**Questions answered in this article:**

- **What is the best hosting platform for developers?** It depends on the workload. Compare a real service across releases, runtime fit, data, observability, complete cost, and portability.
- **Why is this list not ranked?** The platforms specialize in different workloads, so a universal order would hide the assumptions that actually determine fit.
- **How should hosting cost be compared?** Include compute, builds, databases, storage, transfer, logs, addresses, support, minimum replicas, and the engineering work the platform removes.

### 10 YC AI Agent Startups to Watch in 2026

- URL: https://darwa-front.darwa.co/blog/en/10-yc-ai-agent-startups-to-watch-in-2026
- Markdown: https://darwa-front.darwa.co/blog/en/10-yc-ai-agent-startups-to-watch-in-2026/markdown
- Summary: This non-ranked editorial selection uses current YC profiles and official company sites to illustrate ten distinct agent product patterns, verified in August 2026.
- Category: YC AI Startups (https://darwa-front.darwa.co/blog/en/category/yc-ai-startups)
- Tags: YC AI startups, AI agents
- Author: Darwa Engineering — Platform team
- Published: 2026-08-28T04:40:00Z
- Updated: 2026-08-31T19:34:34.240722Z
- Reading time: 5 minutes (1061 words)

**Questions answered in this article:**

- **Is this a ranking of the best YC AI startups?** No. It is a non-ranked, dated editorial selection showing different agent product patterns.
- **How should a company evaluate an AI agent startup?** Run the same real workflow through each candidate and compare completed outcomes, evidence, corrections, security boundaries, retry behavior, and total cost.
- **Why do the company links matter?** Early-stage products change quickly. The YC profile and official company site let readers verify the current product instead of trusting a stale summary.

### Deploying a Laravel application with queues and scheduled tasks

- URL: https://darwa-front.darwa.co/blog/en/deploying-laravel-with-queues-and-scheduled-tasks
- Markdown: https://darwa-front.darwa.co/blog/en/deploying-laravel-with-queues-and-scheduled-tasks/markdown
- Summary: Run the web process, Horizon workers, and the scheduler as three services from a single repository.
- Category: Tutorials (https://darwa-front.darwa.co/blog/en/category/tutorials)
- Tags: laravel, queues, scheduled tasks, deployment
- Author: Darwa Engineering — Platform team
- Published: 2026-07-28T09:00:00Z
- Updated: 2026-07-28T09:00:00Z
- Reading time: 2 minutes (268 words)

### How automatic scaling decides to add an instance

- URL: https://darwa-front.darwa.co/blog/en/how-automatic-scaling-decides-to-add-an-instance
- Markdown: https://darwa-front.darwa.co/blog/en/how-automatic-scaling-decides-to-add-an-instance/markdown
- Summary: A look at the signals behind scaling decisions—request rate, saturation, latency, and queue depth.
- Category: Engineering (https://darwa-front.darwa.co/blog/en/category/engineering)
- Tags: autoscaling, performance, observability, infrastructure
- Author: Darwa Engineering — Platform team
- Published: 2026-07-14T09:00:00Z
- Updated: 2026-07-14T09:00:00Z
- Reading time: 2 minutes (280 words)

### Sending transactional email and SMS from your application

- URL: https://darwa-front.darwa.co/blog/en/sending-transactional-email-and-sms-from-your-application
- Markdown: https://darwa-front.darwa.co/blog/en/sending-transactional-email-and-sms-from-your-application/markdown
- Summary: Wire up transactional email and SMS through built-in integrations without managing provider credentials.
- Category: News (https://darwa-front.darwa.co/blog/en/category/news)
- Tags: email, sms, integrations, notifications
- Author: Darwa Product — Product team
- Published: 2026-06-30T09:00:00Z
- Updated: 2026-06-30T09:00:00Z
- Reading time: 2 minutes (256 words)

## Categories

- [Engineering](https://darwa-front.darwa.co/blog/en/category/engineering) — Explore practical Engineering guides, architecture decisions, checklists, and answers from the Darwa product and engineering teams.
- [Tutorials](https://darwa-front.darwa.co/blog/en/category/tutorials) — Explore practical Tutorials guides, architecture decisions, checklists, and answers from the Darwa product and engineering teams.
- [News](https://darwa-front.darwa.co/blog/en/category/news) — Explore practical News guides, architecture decisions, checklists, and answers from the Darwa product and engineering teams.
- [AI Agents](https://darwa-front.darwa.co/blog/en/category/ai-agents) — Explore practical AI Agents guides, architecture decisions, checklists, and answers from the Darwa product and engineering teams.
- [Agent Workflows](https://darwa-front.darwa.co/blog/en/category/agent-workflows) — Explore practical Agent Workflows guides, architecture decisions, checklists, and answers from the Darwa product and engineering teams.
- [Application Hosting](https://darwa-front.darwa.co/blog/en/category/application-hosting) — Explore practical Application Hosting guides, architecture decisions, checklists, and answers from the Darwa product and engineering teams.
- [Frontend Cloud](https://darwa-front.darwa.co/blog/en/category/frontend-cloud) — Explore practical Frontend Cloud guides, architecture decisions, checklists, and answers from the Darwa product and engineering teams.
- [Platform Guides](https://darwa-front.darwa.co/blog/en/category/platform-guides) — Explore practical Platform Guides guides, architecture decisions, checklists, and answers from the Darwa product and engineering teams.
- [AI Tool Guides](https://darwa-front.darwa.co/blog/en/category/ai-tool-guides) — Explore practical AI Tool Guides guides, architecture decisions, checklists, and answers from the Darwa product and engineering teams.
- [Hosting Comparisons](https://darwa-front.darwa.co/blog/en/category/hosting-comparisons) — Explore practical Hosting Comparisons guides, architecture decisions, checklists, and answers from the Darwa product and engineering teams.
- [YC AI Startups](https://darwa-front.darwa.co/blog/en/category/yc-ai-startups) — Explore practical YC AI Startups guides, architecture decisions, checklists, and answers from the Darwa product and engineering teams.

## Other languages

- Spanish: https://darwa-front.darwa.co/blog/es/llms.txt
- Chinese: https://darwa-front.darwa.co/blog/zh/llms.txt
- Hindi: https://darwa-front.darwa.co/blog/hi/llms.txt
- Arabic: https://darwa-front.darwa.co/blog/ar/llms.txt
- Portuguese: https://darwa-front.darwa.co/blog/pt/llms.txt
- French: https://darwa-front.darwa.co/blog/fr/llms.txt
- German: https://darwa-front.darwa.co/blog/de/llms.txt
- Japanese: https://darwa-front.darwa.co/blog/ja/llms.txt
- Russian: https://darwa-front.darwa.co/blog/ru/llms.txt