Two Delta is a Tel Aviv AI startup, founded in 2025 by Dvir Zeltzer and Dr. Eli David, that builds technology to make AI models run faster and cheaper. Calcalist reported on October 22, 2026 that it raised a seed round of tens of millions of dollars from investors including Bill Ackman, founder of Pershing Square, and Eric Schmidt, former chairman of Google.
Updated November 7, 2026.
The numbers behind the bet: Two Delta reported that its DCOCO method delivered 2.03 times the average throughput of standard decoding across 10 datasets, and a 19.8% gain over the competing DFlash method, on Nvidia DGX B200 hardware. Its EvoWeb benchmark found that runtime errors in AI-built web apps rose from 2% to 12% over ten successive requests. The company has fewer than 10 employees.
Ackman confirmed his investment himself in an interview with the Hebrew business daily Globes. Two Delta is part of the growing group of Israeli AI companies working on infrastructure rather than consumer products.
What is Two Delta and what does it build?
Two Delta is an Israeli artificial intelligence company that develops methods to accelerate AI models and improve how efficiently they use computing resources. Calcalist's CTech describes it as operating with a high degree of secrecy, disclosing little about its business beyond papers published on its website.
Globes reported that the company is registered in Tel Aviv. Its website carries one slogan, which Globes translated as a promise that intelligence is about to change hands and move into the hands of its users.
| Detail | What the reports say |
|---|---|
| Founded | 2025 |
| Base | Tel Aviv, Israel |
| Team size | Fewer than 10 employees |
| Funding | Seed round of tens of millions of dollars (Calcalist, October 22, 2026) |
| Named investors | Bill Ackman, Eric Schmidt |
| Published work | DCOCO inference method with Nvidia, EvoWeb coding-agent benchmark |
Who are Dvir Zeltzer and Dr. Eli David?
Dvir Zeltzer and Dr. Eli David are the two co-founders of Two Delta. Calcalist reports that Zeltzer brings a business and management background, including a senior role at Google, while David is a veteran AI researcher and entrepreneur.
David's earlier company is the part of the story Israeli tech readers will recognize. He co-founded DeepCube, a Tel Aviv company that built software to speed up deep learning, together with Yaron Eitan. In April 2021, Nano Dimension acquired DeepCube for about $40 million in cash and $30 million in stock, according to Calcalist's Hebrew coverage and Bizportal's report on the deal.
David also has a large public audience. Globes reports that his account on X grew from about 300,000 followers to roughly one million, which makes it one of the most popular AI accounts on the platform. That audience gives a company with almost no marketing a direct line to the AI research community.
Why did Bill Ackman and Eric Schmidt invest in Two Delta?
Bill Ackman, founder and CEO of the hedge fund Pershing Square, backed Two Delta because he sees faster AI as useful to every industry. In an interview with Globes reporter Gali Weinreb, published on October 25, 2026, Ackman said the company improves AI itself and can accelerate it, which makes it relevant to all existing industries.
The same interview explains his wider approach to Israel. Globes notes that in January 2024 Ackman and his wife, Neri Oxman, bought 5% of the Tel Aviv Stock Exchange. During his October 2026 visit he predicted that a company worth one trillion dollars will emerge from Israel within five to ten years. He told Globes he prefers to invest by the quality of the founder rather than by category, and named defense tech, cyber and health as Israel's likely strengths.
Eric Schmidt, the former Google chairman, has a longer record in Israel. Walla reported in June 2014 that he visited through Innovation Endeavors, his fund with Dror Berman, and praised Israeli entrepreneurship. At a Google event in Tel Aviv in June 2016, Calcalist reported, he said Israelis were not aiming big enough. A seed investment in a Tel Aviv company founded by an ex-Google executive is a consistent next step.
How does DCOCO speed up AI models?
DCOCO is Two Delta's method for increasing how many tokens an AI model generates in each verification step, and it builds on a technique called speculative decoding. In October 2026 the company published results from a collaboration with Nvidia, applying DCOCO to Nvidia's Nemotron 3.5 Super VL model.
Speculative decoding works in four steps:
- A small, fast model drafts a sequence of likely next tokens.
- A larger, more accurate model checks the whole draft in a single pass.
- The larger model keeps the tokens it accepts and rejects the rest.
- The more drafts the larger model accepts, the faster the output arrives.
The weak point is rejected drafts, which waste work. Two Delta's approach tries to produce drafts the larger model is more likely to accept. It combines candidate-token information with context from the drafting model's hidden states, which are informed by the target model's activations, and it scores combinations of neighboring tokens in parallel before the larger model verifies them.
| Metric | Result reported by Two Delta |
|---|---|
| Datasets tested | 10, covering math, coding and general tasks |
| Average throughput vs. standard decoding | 2.03 times (reasoning off, greedy decoding) |
| Gain over the competing DFlash method | 19.8% on average |
| Workloads tested | Up to 32 concurrent requests |
| Hardware and framework | Nvidia DGX B200 with vLLM |
The Hebrew and English reports give different headline numbers. Globes described a 3.5 times speedup of Nemotron, while Calcalist's technical breakdown puts average throughput at 2.03 times under the specific test conditions above. Speedup figures in this field depend heavily on configuration, and both are results reported by Two Delta, not an independent assessment.
What is EvoWeb and what did it find?
EvoWeb is a benchmark Two Delta published to test whether AI coding agents can keep a web application working as users keep asking for changes. Most benchmarks score a model on a single prompt. EvoWeb scores an application across ten successive requests, one initial build followed by nine modifications.
The study covered 32 web applications, and none of the evaluated models stayed fully functional through the whole sequence. The top performers, Fable 5 and Kimi K3, scored 0.694 and 0.684 on a scale of zero to one. Build failures stayed rare, but runtime errors rose from 2% at the start to 12% after ten requests.
The practical lesson is that coding agents can build an app and add features, yet still break the connections between old and new features as the app grows. For founders choosing AI coding tools, the benchmark offers a repeatable way to test that weakness before committing.
What did the Hebrew press report about Two Delta?
The Hebrew business press broke the Ackman connection before English outlets covered it in depth. Globes (גלובס) ran the headline "ביל אקמן השקיע בחברת AI ישראלית שמבטיחה להאיץ מודלים", which means "Bill Ackman invested in an Israeli AI company that promises to accelerate models."
The names appear in Hebrew coverage as דביר זלצר (Dvir Zeltzer), ד"ר אלי דוד (Dr. Eli David), ביל אקמן (Bill Ackman) and אריק שמידט (Eric Schmidt). Globes wrote that the company has been funded with tens of millions of dollars to date, and that David has said most neural network architectures today are "quite foolish," which he sees as a large opportunity to improve speed and cost.
Globes also reported that David wants language models that do not restrict him and are not overly "woke," a view the paper said probably resonated with Ackman. Both Globes pieces and the Calcalist report agree on the core facts: the 2025 founding, the team of under 10, the Nvidia collaboration and the two named backers.
Where does Two Delta fit in Israeli venture activity?
Two Delta fits a pattern of experienced founders raising large seed rounds for small teams, a trend visible across Israeli venture capital and exits. A team of fewer than 10 people raised tens of millions of dollars because its founders had a prior sale (DeepCube) and a senior Google background.
It also shows U.S. capital reaching Israeli AI through personal relationships. Ackman's holdings in Israel, listed by Globes, are the Tel Aviv Stock Exchange stake, 2Delta, the fund Entrée Capital and the eye-treatment company Salarge. That places Two Delta alongside Israel-diaspora investment networks that move American money into Israeli companies. Founder profiles for similar companies are collected under Israeli founders and companies.
What should readers watch next?
Three things will show whether Two Delta's claims hold up. First, an independent reproduction of the DCOCO throughput numbers on hardware other than Nvidia's DGX B200. Second, a disclosed round size and lead investor, since reports so far say only "tens of millions of dollars." Third, whether Two Delta moves from published research to a product with paying customers.
Readers tracking how AI shapes the Israeli economy can follow related coverage in how AI describes Israel's economy and the data reports in Olam Research.
Frequently asked questions
Who founded Two Delta?
Dvir Zeltzer, a former senior Google executive, and Dr. Eli David, an AI researcher who co-founded DeepCube, founded Two Delta in 2025.
Where is Two Delta based?
Two Delta is registered in Tel Aviv, Israel, and has fewer than 10 employees, according to Globes and Calcalist.
How much did Two Delta raise?
Calcalist reported a seed round of tens of millions of dollars on October 22, 2026. The exact amount has not been disclosed.
Who invested in Two Delta?
Calcalist names Bill Ackman and Eric Schmidt among the investors. Ackman confirmed his investment to Globes in an interview published on October 25, 2026.
What does Two Delta do?
Two Delta develops technology that accelerates AI models and improves the efficiency of the computing they use. Its published work includes the DCOCO inference method and the EvoWeb benchmark for coding agents.
Has Two Delta's Nvidia result been independently verified?
No. The throughput figures come from Two Delta's own research with Nvidia, and Calcalist notes they are not an independent assessment.
What is speculative decoding?
Speculative decoding is a technique in which a small model drafts tokens and a larger model verifies them in a single pass, which speeds up text generation while preserving the larger model's output quality.
How we report: Olam stories draw on public filings, company disclosures and named sources, checked by our editors. Read our methodology · Corrections
