# Belkins.app

> Belkins.app is Vladyslav Podoliako's public Product Lab OS for Folderly mini-products, AI SaaS demand tests, working MVPs, and 14-day validation notes.

Last updated: 2026-09-28
Canonical: https://belkins.app/

## Source Facts
- Canonical entity: Belkins.app is a public product-lab portfolio by Vladyslav Podoliako, the founder and CEO of Belkins and co-founder of Folderly.
- Current catalog: The hub lists 19 product and service landings across 2 cohorts, with 33 Stripe SKUs and 6 related venture/profile links. Launch Audit is a manual service pilot with no Stripe SKU.
- Folderly cluster: Folderly Solo, Folderly Lens, Folderly Flash, and LiveProof by Folderly are positioned as smaller deliverability and outbound-conversion tools inside the lab.
- Validation model: Each product is framed around a fourteen-day demand-test protocol: real landing, working interaction, payment path, then kill-or-scale decision.

## Primary Pages
- [Folderly Launch Audit](https://belkins.app/launch-audit/): Human sender-authentication audit pilot. One domain and one ESP path; request scope before manual invoicing.
- [Email launch guides](https://belkins.app/launch-audit/guides/): Choose a sender-authentication, provider rejection, platform setup or operator-handoff guide.
- [SPF and DKIM pass, but DMARC fails](https://belkins.app/launch-audit/guides/aligned-authentication/): Compare authenticated identities using illustrative direct-mail cases.
- [Gmail, Yahoo and Outlook sender requirements](https://belkins.app/launch-audit/guides/provider-requirements/): Dated primary-document comparison with provider-specific applicability and limits.
- [Email launch operator handoff](https://belkins.app/launch-audit/guides/operator-handoff/): Assign an owner, expected evidence and recheck; download the one-path worksheet.
- [Gmail 550 5.7.26 authentication rejection](https://belkins.app/launch-audit/guides/gmail-550-5-7-26/): Separate Gmail rejection variants before assigning an authentication or alignment check.
- [Outlook 550 5.7.515 sender authentication](https://belkins.app/launch-audit/guides/outlook-550-5-7-515/): Interpret the consumer Outlook rejection and prepare the right evidence for an operator.
- [Mailchimp domain authentication troubleshooting](https://belkins.app/launch-audit/guides/mailchimp-authentication/): Compare account-provided records and DNS hosting behavior when authentication stays pending.
- [Editorial and research method](https://belkins.app/launch-audit/guides/editorial-method/): How sources, constructed examples, evidence limitations and corrections are handled.
- [Homepage](https://belkins.app/): Product Lab OS for Folderly mini-products, AI SaaS experiments, working MVPs, and bootstrap demand tests.
- [Folderly mini-products shipping inside Belkins.app](https://belkins.app/folderly-mini-products): A public catalog of Folderly mini-products inside Belkins.app: Solo, Lens, Flash and LiveProof, covering cold-email deliverability audits, inbox checks, and ROI calculators.
- [SaaS demand tests with a public kill-or-scale protocol](https://belkins.app/saas-demand-tests): Belkins.app documents 19 product and service demand tests with live landing pages, working MVPs, Stripe SKUs, and a 14-day kill-or-scale validation protocol.
- [AI product ideas with real positioning, pages, and payment paths](https://belkins.app/ai-product-ideas): A public portfolio of AI product ideas and SaaS MVPs by Vladyslav Podoliako, including Folderly mini-products, BacklinkBait, InvoiceGPT, PodcastPitch, and more.

## Products
- [Folderly Launch Audit](https://belkins.app/launch-audit/): Diagnose a client’s sender-authentication launch blockers. Human review of one domain and one ESP path. Evidence, prioritized actions, a 45-minute handoff and one recheck. Request scope before a manual invoice; no inbox-placement guarantee. Status: testing. Price: US$495 one-time pilot.
- [InvoiceGPT](https://invoicegpt.belkins.app): Gmail-ready payment nudges. Voice-cloned overdue-invoice nudges for freelancers. Trained on 5 of your real emails — drafts Day +7 / +14 / +30 in your tone, lands in Gmail Drafts for one-click send. Status: testing. Price: solo · $19/mo.
- [GrantRadar.eu](https://grantradar.belkins.app): Grant alerts matched to your CV. EU grant discovery matched against your CV — Horizon, EIC, ERC, MSCA, BMBF, NCN. Weekly digest of ≥80% fit alerts so you stop missing deadlines you didn't know existed. Status: testing. Price: researcher · €79/mo.
- [StackSwap](https://stackswap.belkins.app): Cross-cloud savings audit. Cross-cloud cost arbitrage for AWS / GCP / Azure. Surfaces the top 10 SKUs you could move to Hetzner / Cloudflare / DO with one click. Free first audit. Status: testing. Price: solo · $29/mo.
- [PatentClaims](https://patentclaims.belkins.app): Claim diffs and prior-art surfacing. Patent claim diffing + prior-art surfacing built on the USPTO ODP corpus. For solo inventors and early-stage startups who can't afford $400/hr counsel for every filing. Status: testing. Price: inventor · $49/mo.
- [RegLawFeed](https://reglawfeed.belkins.app): Regulatory diffs that affect shipping. Daily regulatory diffs across FAA UASFM, CFPB, EU GDPR DPA, FDA Devices, FTC. Severity-gated Slack digest — only the things that change what you can ship. Status: testing. Price: operator · $99/mo.
- [PodcastPitch](https://podcastpitch.belkins.app): Podcast matches with grounded openers. Targeted podcast pitches scored against host history. 30 matches/mo, custom opener per match grounded in real episode quotes — written to actually get a yes. Status: testing. Price: founder · $39/mo.
- [BacklinkBait](https://backlinkbait.belkins.app): Weekly linkable-asset prospects. Linkable-asset discovery for SEO teams. 50 fresh prospects/week across 4 source feeds, with a pre-written opener per prospect. Built for niches HARO ignores. Status: testing. Price: solo · $49/mo.
- [MeetingDrift](https://meetingdrift.belkins.app): Recurring meetings to kill. Detects when recurring meetings have lost their purpose. Chrome extension scores every event on your calendar and sends a Friday Slack digest of "kill these". Status: testing. Price: individual · $25/mo.
- [ReceiptRadar](https://receiptradar.belkins.app): Receipts categorized into QuickBooks. Receipt capture + expense categorization for SMBs and bookkeepers. Email receipts to one address, PaddleOCR'd, categorized straight into QuickBooks. Status: testing. Price: smb · $149/mo.
- [Folderly Solo](https://folderly-solo.belkins.app): Mailbox health and reputation alerts. Folderly's enterprise deliverability stack repackaged for solo founders and indie consultants. 1 mailbox monitored, weekly health report, spam-trap + reputation alerts. Status: testing. Price: solo · $39/mo.
- [Folderly Lens](https://lens.belkins.app): KILL / REHAB / KEEP domain audit. External cold-email estate audit by Folderly's deliverability team. Per-domain KILL / REHAB / KEEP — the view Spamhaus already has. Same engine that ran a real 90-domain client audit. First audit free. Status: testing. Price: agency · $149–499/mo.
- [Folderly Flash](https://flash.belkins.app): 30-second deliverability verdict. Send any email, get your deliverability verdict in 30 seconds — SPF/DKIM/DMARC enforcement, spam-trigger & blacklist forensics, one-click Folderly remediation. The mail-tester rewrite, on real infra. Free to test. Status: live. Price: free · $19 teardown.
- [Folderly Frame](https://frame.folderly.com): Pre-send render + will-it-land check. Paste your email HTML, get an engine-accurate render preview across Gmail, Outlook, and Apple Mail, plus a caniemail compatibility linter — then Folderly's differentiator: a "will it land?" deliverability score before you hit send. Email on Acid, with a deliverability brain. Free while in beta. Status: live. Price: free · beta.
- [PeekSafe](https://peeksafe.belkins.app/landing): Local attachment preview. Preview an unfamiliar attachment in your browser before you open it: PDF, Word, Excel, CSV or image. The file never leaves your browser and macros never run. Unlimited and free; hosted share links are planned. Status: live. Price: free.
- [Liven](https://liven.belkins.app): PDF rebuilt as a living page. Your PDF is dead on arrival. Liven rebuilds any deck or report as a living interactive page — tabs, animated numbers, hover-able charts. You send a link, not a 12MB attachment. Status: live. Price: solo · $29/mo.
- [Trail](https://trail.belkins.app): Tracked link engagement dashboard. DocSend for living documents. Host any interactive artifact at one tracked link — see who opened it, which tab they clicked, and the moment they hit book-a-call. Status: live. Price: solo · $19/mo.
- [LiveProof](https://liveproof.belkins.app): Live ROI calculator for cold email. Stop attaching the one-pager. Drop a live ROI calculator into cold email — your prospect drags their own numbers and sells themselves. Lead capture on every drag. Status: live. Price: $39/mo.
- [Dealone](https://dealone.belkins.app): Your first paying customer, found by hand. A First-Customer Program for founders whose dashboard reads zero. A Belkins operator reads public buying signals, names three best-evidenced buyers with the evidence, and sits on your calls. Five rungs from a free public teardown to a fee that only moves after a buyer has paid you. Status: testing. Price: free / $199 / $1,000 + 25%.

## Related Ventures And Profiles
- [Belkins](https://belkins.io): Co-founder & CEO. B2B outbound lead-generation agency. 9 years, 1000+ clients, the work that bought me the right to ship these experiments on my own dime.
- [Folderly](https://folderly.com): Co-founder. Email deliverability SaaS — fixes inbox placement so your outbound actually reaches replies. Trusted by 1000+ B2B teams. Folderly Solo (above) is the indie SKU.
- [Folderly AI](https://generate.folderly.com): AI email generator built on Folderly's deliverability stack. Drafts cold openers trained on what actually lands in inbox and earns a reply. Free to try.
- [LinguaLive](https://apps.apple.com/app/lingualive-ai-language-tutor/id6759350145): AI language tutor for iPhone. Voice-first, real-time conversation practice, personalized lessons. Shipped solo, live on the App Store.
- [Vlad Podoliako](https://vladyslavpodoliako.com): My personal site — bio, writing, talks, things I've shipped. Start here if you want the long-form version of who's behind the experiments.
- [Vlad's Newsletter](https://www.vladsnewsletter.com/): Weekly: what I'm building, what I killed, what I learned. AI products, bootstrap economics, the unglamorous parts of running ventures while shipping side bets.