Semrush vs Vespa.ai
Which Search AI tool is better in 2026?
Semrush
AI-powered online visibility and marketing platform for SEO, content, and ads
Vespa.ai
Big-data serving engine for vector and lexical search
Side-by-side
Vespa.ai leads on both fronts — more capital raised ($31M) and a lower entry price than Semrush.
| Metric | Semrush | Vespa.ai |
|---|---|---|
| Taglinei | AI-powered online visibility and marketing platform for SEO, content, and ads | Big-data serving engine for vector and lexical search |
| Foundedi | 2008🏆 | 2023 |
| HQi | Boston, United States | Trondheim, NO |
| Employeesi | 2351 | 51-100🏆 |
| Neuron scorei | 65 | 82🏆 |
| Total fundingi | Undisclosed | $31M🏆 |
| Latest roundi | IPO · Mar 2021 | Series A · Nov 2023 |
| Valuationi | — | —🏆 |
| Cheapest paid plani | From $139/mo | Pricing not disclosed🏆 |
| Free plani | ✓ | ✓ |
| Free triali | ✓ | ✓ |
| Top tier pricei | Pricing not disclosed | Pricing not disclosed |
| Pricing summaryi | Free · From $139/mo | Free |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for Semrush and Vespa.ai.
| Capability | Semrush | Vespa.ai |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✓ | ✓ |
| Webhooks | ✗ | ✓ |
| OAuth 2.0 | ✓ | ✓ |
| SDK languages | — | 3 (python, java, rest) |
| Free plan | ✓ | ✓ |
| Free trial | ✓ | ✓ |
| Verified | ✗ | ✗ |
| Active deal | ✗ | ✓ |
🟢 Strengths of Semrush
- More mature (2008)
🔵 Strengths of Vespa.ai
- Has raised more capital ($31M vs Undisclosed)
- Higher Neuron score (82 vs 65)
- Newer company (2023)
Which should you choose?
Choose Vespa.ai if price matters most — it starts at Free, which is friendlier for teams watching burn. Both AI Search tools ship core features, so the cost delta often decides it for small teams and solo operators.
Choose Vespa.ai if you want the most established option — it has raised $31M, suggesting more runway for enterprise features, support, and long-term roadmap. For mission-critical workflows or larger teams, that stability often outweighs a lower monthly price.
💸 Deals
Vespa Cloud — $300 in free trial credits
New Vespa Cloud accounts get $300 in trial credits to spin up production-grade vector + lexical search.
Terms: New accounts only. Expires after 30 days.
Frequently asked questions
Semrush vs Vespa.ai — which is better?
It depends on your priority. Semrush is the leaner option; Vespa.ai is cheaper to start. See the side-by-side table above.
Is Semrush cheaper than Vespa.ai?
No — Vespa.ai's cheapest paid plan is Free, while Semrush's is Free · From $139/mo.
Do Semrush and Vespa.ai offer free plans?
Semrush: Yes, has a free plan. Vespa.ai: Yes, has a free plan.
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