Company universe, page 204

Sidewalk connects communities of business operators to give them access to modern property and liability insurance at a significantly lower cost than other insurance providers.

source-backed company entry

SIEMonster provides cost effective Security Information and Event Management (SIEM) SaaS or onsite solutions for all sized companies to detect cyber threats.

sieve solves data cleaning for hedge funds and investment firms by letting them get clean data in four lines of code. Currently, their data pipelines have conditions that raise for human review, which literally send an email to engineers with data that needs to be reviewed. We provide an API that integrates directly into their existing pipeline - instead of raising for human review, they can send all the same information to our API and get clean, high-quality data back. By using our AI agents bu

Sift is the leader in Digital Trust & Safety, empowering digital disruptors to Fortune 500 companies to unlock new revenue without risk. Sift dynamically prevents fraud and abuse through industry-leading technology and expertise, an unrivaled global data network of 70 billion events per month, and a commitment to long-term customer partnerships. Global brands such as DoorDash, Twitter, and Wayfair rely on Sift to gain a competitive advantage in their markets.

Siftly helps brands measure, improve, and scale their visibility inside AI assistants like ChatGPT, Gemini, and Perplexity. We track how your brand is surfaced, compared, and recommended and give you actionable insights to win AI-driven discovery. Think of it as SEO for the AI era, built for B2B, B2C, D2C, and e-commerce growth teams.

Enterprise AI for international trade

Sigen AI is a platform that helps companies monetize their video datasets by solving the problem of unusable video data due to privacy regulations.

Unlocking the power of CCTV and sensor data to deliver strategic intelligence and automated compliance for businesses in the Food & Beverage industry.

Siglo is a wireless ISP for communities in urban Latin America offering a faster, better, and easy-to-pay service.

Sigma Genetics develops devices that can deliver DNA, RNA, and other charged molecules into cells by using magnetic fields. When compared to conventional electroporation, this technique has several key advantages, which include: the absence of arcing, the ability to scale, and the benefit of being non-invasive for in vivo applications. This platform technology can be applied to a wide range of applications- cell therapies, cancer drug delivery, DNA vaccines, biopharma manufacturing, and cosmetic

World's first non-credit rating agency

Global payroll meets financial access for contractors everywhere.

SigmaMind AI is a platform for building voice AI agents purpose-built for call centers. Our agents make and answer calls for lead generation, appointment setting, follow-ups, collections, customer intake, and basic support. Instead of replacing the phone systems a center already uses, we connect on top of them. Because the AI handles many calls at once, a call center can reach far more people than a human team, lower its cost per lead, and stop wasting agent time on calls that go nowhere. Our cu

SigmanticAI is building an AI-native hardware development assistant that automates the entire RTL design flow, from natural language to synthesizable HDL and testbenches, inside a seamless VSCode fork. Powered by fine-tuned Verilog LLMs, reinforcement learning, and real compiler feedback, SigmanticAI iteratively refines code until it compiles and passes synthesis, no matter how complex the design. It’s like the Cursor for HDL design. In addition to code generation, SigmanticAI can generate token

SigmaOS is a new type of browser designed for founders, researchers, and content creators to make you better and faster at working on the web. You work 7+ hours a day on the web. Buried in a sea of 100+ tabs and 10+ web-apps 🤯, you constantly lose context for why you did what you did, and are always one click away from being distracted. We took apart the browser for you, and rebuilt a new experience from the ground-up, for the FASTEST and most PRODUCTIVE work. ⚡

Sign Speak is a real time AI Sign Language Recognition software that allows for translation between Sign Language to English, and vice versa.

Signadot is a Kubernetes-native platform that empowers AI coding agents to verify code at scale. Combining fast, scalable ephemeral environments with a validation framework built for complex distributed systems, Signadot ensures high-velocity code generation results in safely merged pull requests.

Signal is an independent SaaS provider of data onboarding and real-time identity resolution.

Signal fusion provides a multimodal analytics solution that speeds up diagnostics, personalizes treatment, and improves clinical decisions.

source-backed company entry

Signals is a new iMessage revenue channel for DTC ecommerce brands that gets customers to buy again. After a purchase, we open a real two-way conversation over iMessage, the channel customers actually read and reply to, and turn it into repeat revenue. In A/B tests, that drives ~$30 in average incremental repeat revenue per conversation.

SignalsHQ is building AI Tax Accountants that automate compliance workflows for US CPA firms

We make precision diagnostics more accessible, starting with breast cancer prognosis. Current tests that guide the use of therapy are really slow and expensive because they need to be run in complex centralized facilities. Our tests are designed to be easily run by local hospital labs, reducing turnaround time from over three weeks to a few days and for a fraction of the price.

source-backed company entry

Making it easy for contractors and people in the trades to generate contracts and change orders and to request signatures.

SigNoz is an open-source observability platform native to OpenTelemetry with logs, traces and metrics in a single application. An open-source alternative to DataDog, NewRelic, etc. Open source Application Performance Monitoring (APM) & Observability too

SigOpt is the optimization platform that amplifies your research. SigOpt takes any research pipeline and tunes it, right in place. Our cloud-based ensemble of optimization algorithms is proven and seamless to deploy, and is used by globally recognized leaders within the insurance, credit card, algorithmic trading and consumer packaged goods industries.

The emotional intelligence platform for remote teams. We help remote managers master EQ to drive performance and employee retention.

Twende is a platform that offers reliable shared transport

Sila is an agent-native messaging platform where teams and agents collaborate in the same conversations. Every agent works from the live context of everything your team says. We're defining the standard for how companies work in the agent era by creating a new type of communication layer for team-agent and agent-agent collaboration.

Building your personalized medicine platform using your own cells.

Rapidly optimized propellers for every mission

Automate and digitize pharmaceutical companies' FDA required work.

We're building AI-native core tools & agent-driven workflows for frontend chip design. Today, Silimate is helping Fortune 500s and chip unicorns create & iterate to correct, optimized designs 40x faster. Our goal is to enable autonomous spec-to-design for silicon.

SilkChart analyzes sales calls and measures how well playbooks are executed. It proactively surfaces coaching opportunities to managers, and provides reps with actionable feedback to close more deals.

Silmaril is the first runtime security for AI that self-improves. It understands application context to block 2x as many threats as current SOTA defenses with 10x lower latency. Customers plug us into agentic frameworks like LangGraph with 5 lines of code. Silmaril has stopped $28M of damages for customers.

source-backed company entry

Silogy is building an AI-powered platform for chip developers to simulate and debug their designs.

Silurian is building foundation models for simulating Earth, starting with weather. From assessing the risk of wildfires to predicting the energy grid load, we provide an infrastructure layer for our planet. Our frontier models push the boundaries of what can be simulated on Earth and improve decision making across vital sectors including energy, insurance, agriculture, and logistics.

At Silver, they are building the world's first miniaturized Raman spectroscope for consumers. Our spectroscope, combined with our proprietary nanoparticle substrates, enables our users to detect many contaminants instantaneously.

Advancing drug and gene delivery with nanoparticles for kidney and cardiovascular diseases

source-backed company entry

The Ultimate Business Intelligence Solution For E-Commerce Marketplaces

Silversheet helps healthcare facilities and medical staff connect and work together more efficiently.

Developing 100% bio-based emulsions for the $26B polymer emulsion market for adhesives, binders and coatings, reducing dependence on petroleum while helping clean up our world.

Sim enables fast-growing technical teams to build and deploy AI agent workflows. 70,000+ developers are already using Sim, integrating with 1000+ apps and LLMs to streamline workflows with AI agents.

Simantic is modernizing the embedded firmware industry with hardware simulation developed for the adoption of AI in hardware engineering. Simantic gives both humans and AI the visibility into hardware previously limited by the physical world.

SimbaPay is revolutionizing sending money from Europe to Africa.

We get patients to their next appointment