Welcome to the Proof of Usefulness Hackathon spotlight, curated by HackerNoon’s editors to showcase noteworthy tech solutions to real-world problems. Whether you’re a solopreneur, part of an early-stage startup, or a developer building something that truly matters, the Proof of Usefulness Hackathon is your chance to test your product’s utility, get featured on HackerNoon, and compete for $150k+ in prizes. Submit your project to get started! Welcome to the Proof of Usefulness Hackathon spotlight, curated by HackerNoon’s editors to showcase noteworthy tech solutions to real-world problems. Whether you’re a solopreneur, part of an early-stage startup, or a developer building something that truly matters, the Proof of Usefulness Hackathon is your chance to test your product’s utility, get featured on HackerNoon, and compete for $150k+ in prizes. Submit your project to get started! Proof of Usefulness Hackathon spotlight Proof of Usefulness Hackathon spotlight Proof of Usefulness Hackathon Proof of Usefulness Hackathon $150k+ Submit your project to get started Submit your project to get started Today, we are interviewing Gaurav Talwar, the creator behind BarterAds. This programmatic ad exchange lets businesses use their unused ad inventory to acquire customers rather than paying cash, essentially creating a powerful barter system for digital advertising. BarterAds What does BarterAds do? And why is now the time for it to exist? BarterAds is a programmatic ad exchange that lets businesses use their unused ad inventory to gain customers instead of paying cash. Companies earn Barter Dollars by showing ads and spend those same credits to run targeted campaigns across the network. It helps startups, SaaS platforms, marketplaces, and content publishers grow without burning cash on traditional advertising. Now’s a good time for BarterAds to exist because SMBs are increasingly struggling with high customer acquisition costs and need viable, cash-free avenues to scale their user base. What is your traction to date? How many people does BarterAds reach? Launch planned by mid April - pilot planned with 20+ SMB. Who does BarterAds serve? What’s exciting about your users and customers? SMBs struggling with high CAC and can use their website inventory to Barter digital ads with other participants in the network. What technologies were used in the making of BarterAds? And why did you choose ones most essential to your techstack? BarterAds is architected as an event-based ad exchange relying heavily on Google Cloud Platform, including Firebase, CloudRun, PubSub, BigQuery, GCS, and Redis in backend. Client side library in js, android and ios. The team also integrated cutting-edge AI via Gemini and Vertex AI, to ensure a seamless and robust programmatic advertising experience. What is traction to date for BarterAds? Around the web, who’s been noticing? Currently in the pre-launch phase, BarterAds is actively planning a pilot in Australia slated for mid-April. The initial strategy aims to onboard over 20 digital-only businesses with 1,000 to 20,000 DAU to create a balanced network, with a near-term goal of reaching 100 million impressions per month before expanding into new geographies. BarterAds scored a 45.36 proof of usefulness score (https://proofofusefulness.com/report/barterads) - how do you feel about that? Needs reassessed or just right? https://proofofusefulness.com/report/barterads I think it is accessed as a concept as of now and hence the low score. I will resumit it for eval again in a few months. What excites you about BarterAds's potential usefulness? * The project focuses on utilising underutilised inventory across the web and ultimately helping consumers barter and save a considerable portion of money. We invoice at the end of each month, charging 8% of the used media value, which eliminates the need for upfront hard cash for advertising. Although bartering is available for larger enterprises through offline barter exchanges, BarterAds enables SMBs to barter and save money. Walk us through your most concrete evidence of usefulness. Not vanity metrics or projections - what's the one data point that proves people genuinely need what you've built? Well, I do not have the metrics to prove it as of now, but barter has been the core of every transaction we do - using currency or otherwise. I think I will have to update this post in a few months time to answer this question. How do you measure genuine user adoption versus "tourists" who sign up but never return? What's your retention story? The first pilot is founder led onboarding, its not just flocking companies - we are building an ecosystem which has to be coherent and should make sense for all participants. We are building a genuine system where we will not have to convince companies to join - they will join because it will make sense. If we re-score your project in 12 months, which criterion will show the biggest improvement, and what are you doing right now to make that happen? In 12 months we would like to create a list of success stories for SMB participants, backed by solid publicly available metrics. We are integrating AI not for fluff, but where it actually shines - Analytics, Fraud detection, Automating user onboarding and application categorisation + creatives creation. Currently the onboarding/verification process takes around 3-5 minutes, and we are planning to do this in under 60 seconds in next 12 months - this will be done by automating internal validation/verification processes. You mentioned planning a pilot in Australia with over 20 digital-only businesses; what specific criteria are you using to select these initial partners to ensure the ad exchange network remains balanced? We are planning to onboard small businesses with 1-20k DAU and prove the metrics and build defendable analytics before onboarding mid level players. The idea is to build metrics and analytics/processes to defend the system from fraud and exploitation before opening the flood gates. Scaling to 100 million impressions per month is an ambitious near-term goal; how do you plan to stimulate the liquidity of "Barter Dollars" to achieve this volume shortly after launch? 100million impressions a drop in the sea of impressions - for comparison Google display network does atleast 2Billion impressions per hour. 100M impression can be achieved by onboarding 85 small businesses with 10K DAU showing 4 ads per user per day. We expect a mix of small and medium businesses from 1K-100K DAU - with an average 15-20K DAU, which makes our target around 60. This 100M impression equates to around 500K AUD traded media value in AU. Since you invoice at the end of each month for an 8% fee on used media value, how do you ensure that SMBs find the quality of the bartered ad inventory as useful and effective as traditional, cash-based ad networks? The quality is maintained by analytics and the matching algorithm backed by analytics ML. It is not just matching an ad with an inventory, we make sure the context matches and user interests matches too. On top of this each inventory is scored in real time and fraud detection algorithms analyse each impression. We also provide end to end tracking of user story like google floodlight does. From impression -> click -> conversion - businesses will be able to track all interactions. We will provide first 6 months free to the initial pilot SMBs, until we reach the 100M impressions per month mark. At that stage we will have enough liquidity, analytics and metrics to finetune our system to extract the maximum value out of it. Meet our sponsors Meet our sponsors Meet our sponsors Bright Data: Bright Data is the leading web data infrastructure company, empowering over 20,000 organizations with ethical, scalable access to real-time public web information. From startups to industry leaders, we deliver the datasets that fuel AI innovation and real-world impact. Ready to unlock the web? Learn more at brightdata.com. Bright Data: Bright Data is the leading web data infrastructure company, empowering over 20,000 organizations with ethical, scalable access to real-time public web information. From startups to industry leaders, we deliver the datasets that fuel AI innovation and real-world impact. Ready to unlock the web? Learn more at brightdata.com. Bright Data: brightdata.com Neo4j: GraphRAG combines retrieval-augmented generation with graph-native context, allowing LLMs to reason over structured relationships instead of just documents. With Neo4j, you can build GraphRAG pipelines that connect your data and surface clearer insights. Learn more. Neo4j: GraphRAG combines retrieval-augmented generation with graph-native context, allowing LLMs to reason over structured relationships instead of just documents. With Neo4j, you can build GraphRAG pipelines that connect your data and surface clearer insights. Learn more. Neo4j: more Storyblok: Storyblok is a headless CMS built for developers who want clean architecture and full control. Structure your content once, connect it anywhere, and keep your front end truly independent. API-first. AI-ready. Framework-agnostic. Future-proof. Start for free. Storyblok: Storyblok is a headless CMS built for developers who want clean architecture and full control. Structure your content once, connect it anywhere, and keep your front end truly independent. API-first. AI-ready. Framework-agnostic. Future-proof. Start for free. Storyblok: Start for free . Algolia: Algolia provides a managed retrieval layer that lets developers quickly build web search and intelligent AI agents. Learn more. Algolia: Algolia provides a managed retrieval layer that lets developers quickly build web search and intelligent AI agents. Learn more. Algolia: Learn more

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BarterAds Earns a 45.36 Proof of Usefulness Score by Building a Programmatic Ad Exchange for Unused Inventory

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