The latest articles on Forem by Gulshan Yadav (@gulshan_yadav_048691962cb). https://forem.com/gulshan_yadav_048691962cb https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F2134389%2Fc9521ffc-977a-4dd5-8b72-0d7af84408c4.jpg https://forem.com/gulshan_yadav_048691962cb en Gulshan Yadav Sat, 28 Mar 2026 12:33:01 +0000 https://forem.com/gulshan_yadav_048691962cb/show-dev-misarmail-self-hosted-email-infrastructure-transactional-marketing-bulk-4oca https://forem.com/gulshan_yadav_048691962cb/show-dev-misarmail-self-hosted-email-infrastructure-transactional-marketing-bulk-4oca <h2> What I Built </h2> <p>MisarMail is a self-hosted email infrastructure platform for sending transactional, marketing, and bulk email — without paying SendGrid, Mailgun, or Resend.</p> <p><strong>URL:</strong> <a href="https://mail.misar.io" rel="noopener noreferrer">https://mail.misar.io</a></p> <h2> Why I Built It </h2> <p>Every product I ship needs email — welcome emails, password resets, newsletters, bulk campaigns. Third-party email services add up fast. I wanted full control, zero per-email cost, and a simple API I own.</p> <h2> How It Works </h2> <ul> <li> <strong>REST API</strong> — <code>POST /api/v1/send</code> with your payload, done</li> <li> <strong>SMTP relay</strong> — drop-in replacement for any SMTP config</li> <li> <strong>Bounce handling</strong> — automatic bounce and complaint processing</li> <li> <strong>Delivery tracking</strong> — opens, clicks, delivery status</li> <li> <strong>Multi-domain</strong> — send from multiple domains and identities</li> </ul> <h2> Tech Stack </h2> <p>Self-hosted on a Hetzner VPS via Coolify. Mailcow under the hood for SMTP, custom API layer on top.</p> <h2> Try It </h2> <p><a href="https://mail.misar.io" rel="noopener noreferrer">https://mail.misar.io</a></p> <p>No third-party email spend. Full delivery control. API-first.</p> ai email Gulshan Yadav Fri, 27 Mar 2026 21:07:16 +0000 https://forem.com/gulshan_yadav_048691962cb/show-dev-free-ai-cost-calculators-for-developers-llm-costs-evaluations-tokens-rag-7b6 https://forem.com/gulshan_yadav_048691962cb/show-dev-free-ai-cost-calculators-for-developers-llm-costs-evaluations-tokens-rag-7b6 <p>I built a set of <strong>4 free AI calculators</strong> that run entirely in the browser — no signup, no API keys, no backend.</p> <p>🔗 <strong><a href="https://tools.misar.io" rel="noopener noreferrer">tools.misar.io</a></strong></p> <h2> What's included </h2> <h3> 1. LLM Cost Calculator </h3> <p>Compare pricing across <strong>14 models</strong> from OpenAI, Anthropic, Google, Mistral, Groq, and DeepSeek. Enter your token usage and get real-time daily, monthly, and annual cost projections. See all providers side-by-side sorted by cost.</p> <h3> 2. AI Evaluation Scorecard </h3> <p>Assess AI system quality across multiple dimensions — accuracy, latency, cost efficiency, safety, and more. Get a weighted composite score to compare different AI approaches.</p> <h3> 3. Prompt Token Estimator </h3> <p>Count tokens before making API calls so you know exactly what you'll pay. Supports multiple tokenizer models.</p> <h3> 4. RAG Cost Estimator </h3> <p>Calculate the true cost of running retrieval-augmented generation pipelines — embedding costs, vector DB storage, retrieval queries, and generation costs combined.</p> <h2> Why I built this </h2> <p>Every AI team I've worked with wastes time on spreadsheets trying to estimate costs. These tools solve that with zero friction — open the URL, use the calculator, done.</p> <h2> Tech stack </h2> <ul> <li>Pure HTML/CSS/JavaScript — no frameworks, no dependencies</li> <li>Runs entirely client-side in your browser</li> <li>Mobile responsive</li> <li>Free forever</li> </ul> <p>Would love feedback from the community. What other AI calculators would be useful?</p> <p>Built by <a href="https://linkedin.com/in/mrgulshanyadav" rel="noopener noreferrer">Gulshan Yadav</a> at <a href="https://misar.io" rel="noopener noreferrer">Misar AI</a></p> showdev ai webdev productivity