Uptail builds custom AI agents (an "agentic AI workforce") for B2C sales on WhatsApp and voice, instantly responding to inbound leads, qualifying them, booking sales calls and following up 24/7 in 80+ languages, with integrations into Salesforce, HubSpot, Zoho, Dynamics, Genesys, Talkdesk and SAP. Founded in Madrid in 2024 by Carlos Delgado (ex-Amazon, ex-SellerX, MIT Sloan MBA) and Guillermo Prieto, it is a pre-seed/early-stage B2B SaaS startup of roughly 8-10 people, headquartered at Paseo de la Castellana 194, and says its agents handle 30,000+ conversations per month for customers including Glovo, Impress and UNIR.
SectorsAI & Data, Enterprise Software, Sales Automation, Conversational AI, B2B SaaS
Start-up MapAI & Data › AI sales & GTM automation
Founders
C
Carlos Delgado
Founder & CEO
G
Guillermo Prieto
Founder & CTO
Global models 5
QQualified
United States · www.qualified.com ↗
Sells AI agents (Piper, its AI sales rep) as B2B SaaS. They instantly engage inbound leads, qualify them and book sales meetings around the clock, integrated with Salesforce.
$163MComparable
YYellow.ai
United States · yellow.ai ↗
Sells enterprises a conversational AI agent platform on WhatsApp, voice and chat that handles consumer conversations, including lead capture and sales, in 100+ languages.
$102MComparable
RRegal
United States · www.regal.ai ↗
Sells B2C companies AI voice and SMS agents that call and follow up with inbound leads, qualify them and convert them into sales. It connects to their CRM and contact-centre stack.
$82MComparable
111x
United States · www.11x.ai ↗
Sells an 'AI digital workforce' as a subscription, including an AI SDR and a voice agent (Julian) that responds to and qualifies inbound leads and books meetings 24/7.
$76MComparable
CConversica
United States · www.conversica.com ↗
Sells AI assistants as B2B SaaS. They automatically engage, qualify and follow up with inbound leads over multiple channels and languages, then hand hot leads to sales teams via CRM integrations.
$71MComparable
In the same niche 10 others
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Notes: Most funded first
Investors 3
Open as list →
Funding rounds 1
| Date | Round | Amount | Lead |
|---|---|---|---|
| 2025-01 | Pre-seed | — |
Lead not disclosed
+3 more
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News 2
Open as list →| Published | Article |
|---|---|
| 2026-05-19 |
Plus Partners surpasses 45 million in its first fund and closes six operations in one year ↗
Demócrata
2026-05-19 |
| 2026-03-23 |
Carlos Delgado (Uptail): «No vendemos software, construimos, optimizamos y somos responsables de los resultados» ↗
Relación Cliente
2026-03-23 |