Machine-Checked Devcon Week: online Lean 4 hackathon on Ethereum networking, $1,000 prize pool

Invisible Garden is running an online hackathon during Devcon week, 2 to 7 November 2026, where participants implement pieces of Ethereum's networking layer in Lean 4 and prove properties of what they build. Participation is free and curated, with a cohort of under ten contributors; acceptances are announced in the Invisible Garden Discord. Applications close 1 November 2026.

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Stellar Community Fund SCF #46 Build Awards: up to $150K in XLM per project

The Stellar Community Fund round SCF 46 is in its submission phase for Build Awards, which offer up to $150K in XLM per project, plus technical audits and access to accelerators and VCs. Teams submit an interest form and are invited to apply if eligible; the submission deadline is November 9, 2026.

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Zcash Coinholder-Directed Retroactive Grants Q4 2026 call for proposals

The program funds work that is already fully completed and publicly verifiable; anyone can submit their own work or nominate an individual, company or project. There is no fixed cap on request size, but grants above $50,000 require FPF KYC checks before disbursement. The program is funded by 12% of Zcash block rewards (ZIP 1016) plus initial capital from the Deferred Dev Fund Lockbox, and coinholders decide funding in a vote scheduled for December. Deadline to submit a proposal: November 13 at 20:00 UTC.

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Plether audit competition on Immunefi: $80,000 in USDC reward pools (Nov 2-15)

Immunefi is hosting an audit competition for Plether, an onchain protocol for trading and hedging the strength of the US dollar, with rewards paid in USDC from three pools: a $56,000 primary pool, a $16,000 All Stars pool and an $8,000 podium pool. A runnable proof of concept is required, and the competition runs from November 2, 2026 at 06:00 UTC to November 15, 2026 at 23:59 UTC.

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Tatum x Walrus Total Recall hackathon: $4,500 prize pool, online, closes Nov 10

Tatum and Walrus are running Total Recall, an online hackathon from 20 Oct to 10 Nov 2026 for building an app that remembers and improves over time, with a $4,500 prize pool across three tracks: Markets & Sports Prediction, Smart Agents for Real Life, and Consumer Finance Apps. Eligibility and the per-track split are not stated. Details and sign-up are on Tatum's hackathon page.

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Canton Dev Fund grants RedStone 15,775,000 CC (~$1.83M) for open-source CAPS pricing standard

The Canton Development Fund approved proposal 497 from RedStone to build the Canton Access and Privacy Standard (CAPS), an open-source, Daml-native standard for delivering reference prices on the Canton Network while keeping each institution's positions and deal terms private. The grant is set at 15,775,000 Canton Coin, calculated at a baseline of 1 CC = 0.1160 USD, paid across eight milestones over 12 months, with half of the payments tied to adoption milestones.

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BCH BLAZE 2026: online Bitcoin Cash hackathon, $8,000+ in prizes (register by Nov 13)

BCH BLAZE 2026 is an 8-day online hackathon for Bitcoin Cash builders, designers and entrepreneurs, hosted on DoraHacks, with prizes totaling $8,000+ (25 BCH), paid in ParyonUSD CashToken, and Mainnet and Media tracks plus sponsor bounties. Register solo or as a team of up to four by Nov 13; building runs Nov 14-22, and winners are announced at the Nov 28 showcase.

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NEAR Hackathon November 2026

NEAR Protocol's NEAR HACKATHON has $250K+ in prizes, paid in NEAR: a $55K grand prize plus thirteen 1st ($10K), 2nd ($3K) and 3rd ($2K) awards. No signup; ship a public repo and public demo post between November 1 and November 14, 23:59 UTC. Build on NEAR Intents, chain signatures, chain abstraction, NEAR AI Cloud and more.

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Uniswap Foundation Security Fund November 2026 cohort: up to 100% audit subsidies, apply by Nov 7

Projects building in the Uniswap ecosystem, including Uniswap v4 hooks and Uniswap Trading API integrations, can apply for up to 100% subsidy on audit costs, plus a pre-audit security scan and tooling suite, access to Areta's curated auditor marketplace, and competitive quotes and guidance from first scan to final report. The fund has supported 35+ projects in earlier cohorts. Apply by November 7, 2026, 23:59 UTC.

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Reactive Omni Buildathon: $5,500 in prizes, paid in REACT

Reactive Network is running the Reactive Omni Buildathon from November 5 to December 5, 2026, on DoraHacks, to test its new Omni version (CometBFT, ~1-second blocks), with three tracks: Every Second Counts (latency-sensitive DeFi on Unichain Sepolia and/or Base Sepolia; $2,000 first, $250 runner-up), Set It and Forget It (personal automations; $2,000 first, $250 runner-up) and Reactive Meets AI ($1,000 first). Repositories must be public and open source at submission.

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Tari Council November Build Contest (MVP): 1M / 500K / 250K XTM prizes

The Tari Council's November Build Contest asks builders to ship a minimum viable product on Tari in November, ahead of the Ootle launch on November 11. Entries may build on open-source code from earlier contest rounds. Code must be under an OSI-approved open source license; Tari Council members and Tari Labs employees are not eligible. Submit by replying to the official forum thread with code, app link, description, payment address and a public announcement post. Cutoff: 00:00 UTC, December 1, 2026.

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Arbitrum Foundation commits $300K to 9 teams from Founder House Singapore

The commitment supports the teams' next stage of growth; this is a results announcement, not an open call. In the General Track ($120K), Atoma took first prize of $60K, Kurtosis $40K, and Chainwall and WageFlow shared the $20K third prize.

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Quick reminder for everyone still here: The AI and OSS grant wires have been heating up lately, with lots of new grants, hackathons and funding calls coming through:

AI: @aigrantwire
OSS: @ossgrantwire

Check them out if you're interested! 🫡

GoodDollar GoodBuilders Season 5: USD 50,000+ in G$ rewards

GoodDollar's GoodBuilders Season 5 funds new and returning teams building products with GoodDollar (G$), offering USD 50,000+ in G$ rewards streamed continuously through Flow State based on progress, plus weekly 1:1 mentorship, practical workshops and Demo Days. Kickoff and streaming start Nov 9. Application deadline: Nov 9, 2026. Apply: ubi.gd/gbuilders5-apply

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Hastra bug bounty: up to $100,000 in USDC for critical findings

Hastra launched a bug bounty program covering its vaults, contracts and site, paying up to $100,000 in USDC on Solana for a critical finding. Reports are submitted privately at bugbounty.hastra.io under coordinated disclosure, and testing must use a local fork or controlled simulation, not mainnet or public testnets. Ongoing; no deadline.

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Canton Foundation launches Canton Community Research Grants for research, education and advocacy

The Canton Foundation introduced the Canton Community Research Grants, a new discretionary program supporting independent research, education and advocacy that helps people understand Canton Network, from tokenomics and technical analysis to institutional use cases and educational content.

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Octant Epoch 13 results: 13 privacy projects funded, full 100 WETH matching pool allocated

Octant reported on November 4, 2026 that Epoch 13 funded 13 privacy projects and allocated its full 100 WETH matching pool. Octant's epochs are funded by the Golem Foundation. The same update shares a new report, written by Kairos Research with Golem Foundation and Ethereum Institutional, on how treasuries manage their ETH. This is a results update, not an open call.

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Base Stocks Maxxing: $100,000 in prizes for tokenized stock products on Base

Base announced Stocks Maxxing, a one-month competition to build the next generation of tokenized stock products on Base, with $100,000 in total prizes.

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Amazon Research Awards, AWS Cryptography Fall 2026: up to $80,000 + $40,000 AWS credits

Amazon Research Awards' AWS Cryptography call for proposals (Fall 2026) funds academic research in areas including formal verification, fully homomorphic encryption, multi-party computation, privacy-preserving AI inference and training, and AI-security definitions. Selected principal investigators may receive up to $80,000 in unrestricted funds and up to $40,000 in AWS Promotional Credits, plus training with Amazon scientists. Submission period: October 1 to November 11, 2026, 11:59 PM Pacific; decisions in February 2027.

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Karma launched RFP Search with Ethereum Foundation support

RFP Search is an open index of Ethereum-ecosystem funding — grants, RFPs, hackathons, bounties and accelerators — with a public API, Atom/RSS feeds, MCP/agent skill, and a CC0 open standard, with about 170 listings at launch and every listing linking back to the funder's own apply page.

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Arbitrum Rewarding Active Delegates — October 2026 results: $12,000 to 28 delegates

Arbitrum OpCo posted the October 2026 Rewarding Active Delegates results on 2 November 2026. October counted four proposals; 28 of 32 enrolled delegates qualified for rewards and $12,000 was distributed (budget envelope $12,000 vs September's $15,000). This is a results update, not an open call.

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