
1. Vercel AI SDK
Vercel · San Francisco · AI agent & LLM development platforms · 4.5/5
TypeScript AI toolkit.
Free
Free plan available
Free, independent software advice for Indian businesses
For software companies: reach Indian businesses ready to buy

AI agent & LLM development platforms · Alternatives
Semantic Kernel is an ai agent & llm development platforms product from Microsoft, Redmond, priced at Free with a free plan. We compared 20 alternatives on published price, free plan, platforms and made-in-India support: 13 have a free plan, 3 are built in India.
Quick answer
The closest alternatives to Semantic Kernel are Vercel AI SDK (Free), Portkey (Free plan), Botpress AI (Free plan), Stack AI (Free plan) and Braintrust (Free plan). Vercel AI SDK is the top-ranked option with a free plan.
Indian support and GST
Semantic Kernel is built in United States. 3 alternatives are made in India, where GST, TDS and UPI are usually handled natively and support runs on IST.
Ranked by how closely each product matches Semantic Kernel's category, pricing model, platforms and business size, then by rating. Prices exclude GST.
| # | Software | Starting price | Free plan | Platforms | Made in India | Rating | Compare |
|---|---|---|---|---|---|---|---|
| — | Semantic Kernel (current) | Free | Yes | Web | No | 4.5/5 | — |
| 1 | Vercel AI SDK | Free | Yes | Web | No | 4.5/5 | |
| 2 | Portkey | Free plan | Yes | Web | Yes | 4.5/5 | |
| 3 | Botpress AI | Free plan | Yes | Web | No | 4.5/5 | |
| 4 | Stack AI | Free plan | Yes | Web | No | 4.4/5 | |
| 5 | Braintrust | Free plan | Yes | Web | No | 4.3/5 | |
| 6 | Modal | Free plan | Yes | Web | No | 4.3/5 | |
| 7 | Jina AI | Free plan | Yes | Web | No | 4.3/5 | |
| 8 | OpenAI API | Pay as you go | No | Web | No | 4.4/5 | |
| 9 | Google Vertex AI | Pay as you go | No | Web | No | 4.4/5 | |
| 10 | Guardrails AI | Free plan | Yes | Web | No | 4.3/5 | |
| 11 | Wysa | Free plan | Yes | Web | Yes | 4.4/5 | |
| 12 | Together AI | Pay as you go | No | Web | No | 4.4/5 | |
| 13 | Free plan | Yes | Web | No | 4.3/5 | ||
| 14 | Fireworks AI | Pay as you go | No | Web | No | 4.4/5 | |
| 15 | Pay as you go | No | Web | Yes | 4.5/5 | ||
| 16 | Mistral AI Platform | Pay as you go | No | Web | No | 4.3/5 | |
| 17 | Mindsdb | Free plan | Yes | Web | No | 4.2/5 | |
| 18 | Dust | Free plan | Yes | Web | No | 4.2/5 | |
| 19 | Smallest.ai | Free plan | Yes | Web | No | 4.2/5 | |
| 20 | Vapi | Pay as you go | No | Web | No | 4.3/5 |

Vercel · San Francisco · AI agent & LLM development platforms · 4.5/5
TypeScript AI toolkit.
Free
Free plan available

Portkey · Bengaluru · AI agent & LLM development platforms · 4.5/5
AI gateway and observability built in Bengaluru.
Free plan
Free plan available
Compared with Semantic Kernel

Botpress · Quebec City · AI agent & LLM development platforms · 4.5/5
AI agent platform.
Free plan
Free plan available

Free plan
Free plan available

Free plan
Free plan available

Modal · New York · AI agent & LLM development platforms · 4.3/5
Serverless AI infrastructure.
Free plan
Free plan available

Jina AI · Berlin · AI agent & LLM development platforms · 4.3/5
Embeddings and search foundation.
Free plan
Free plan available

OpenAI · San Francisco · AI agent & LLM development platforms · 4.4/5
GPT models and tools via API.
Pay as you go
Free trial
Compared with Semantic Kernel

Google · Mountain View · AI agent & LLM development platforms · 4.4/5
ML and generative AI platform.
Pay as you go
Free trial
Compared with Semantic Kernel

Guardrails · Menlo Park · AI agent & LLM development platforms · 4.3/5
LLM output validation.
Free plan
Free plan available
The closest matches to Semantic Kernel on App Advisor are Vercel AI SDK (Free), Portkey (Free plan), Botpress AI (Free plan). They are ranked by how closely their category, pricing model, platforms and target business size match Semantic Kernel, then by rating. The best choice depends on your team size and budget.
Yes. 13 of the 20 alternatives listed have a free plan or are free: Vercel AI SDK (Free), Portkey (Free plan), Botpress AI (Free plan). Free plans usually cap users, records or transactions, so check the limits against your monthly volume.
Yes. 3 alternatives are built in India, including Portkey (Free plan), Wysa (Free plan), E2E TIR (Pay as you go). Indian products usually handle GST, TDS and UPI natively and bill in rupees.
Vercel AI SDK is the closest match to Semantic Kernel in our catalogue. Compare them side by side before you book a demo.
Every product listed sits in ai agent & llm development platforms or a category Semantic Kernel also covers, and Microsoft's own products are excluded. Prices, free plans and platforms come from each vendor's official website. App Advisor does not sell any of this software.
Free shortlist
Tell us your team size and budget and we'll send a shortlist of three.