Stop Renting Software. Own the Box.
CktHub builds standalone devices that do the work of subscription-based tools locally. Your data stays with you, the device keeps working without the cloud, and there is nothing to renew every month.
Software you rent → Hardware you own.
Some software jobs can run perfectly well on dedicated hardware. Here's the transformation, step by step — this is how every CktHub product gets made.
Monthly SaaS
You pay every month for a tool that does one job — monitoring, attendance, inventory, a dashboard, an alert.
Identify the useful function
Strip the tool down to the actual job you rely on. Ignore the platform features you never open.
Run it locally
Move that job onto hardware in your building — no cloud round-trip needed for it to work.
Dedicated hardware
One box, one job. An ESP32 or ESP32-S3 core with the exact sensors, display and I/O the job needs.
Buy once
One payment. The device is yours — the firmware is flashed in, nothing to license.
Own it
It keeps working offline, your data stays local, and the monthly invoice stops.
What if software didn't need a subscription?
Lots of tools perform simple, repetitive jobs: watch a sensor, count something, show a number, log an event. Those jobs can run on a box sitting next to you instead of a server billing you monthly.
Not every SaaS product can or should become hardware — big analytics, collaboration and anything that genuinely needs a network of servers stays in software. But for the jobs that are really just a sensor, a screen, and a bit of logic, the subscription is the expensive part.
Hardware that does the job.
The device roadmap: standalone boxes that take over the work of familiar subscription tools. Each one runs locally, keeps your data on-site, and has no monthly fee. Working on one? Tell us — it moves up the build queue.
Local restaurant POS + kitchen display
Order-taking and kitchen display running on-site. No internet needed to take an order, no per-terminal fee.
Replaces Toast / PetpoojaReview collection kiosk
Countertop kiosk that captures reviews locally and syncs on your schedule, not theirs.
Replaces Google Review SaaS widgetsOffline-first booking kiosk
Appointment scheduling that keeps taking bookings even when your connection drops.
Replaces Calendly / Square AppointmentsDigital signage / price display
Menu boards and price displays driven from a local controller, not a cloud CMS with a monthly seat price.
Replaces Yodeck / ScreenCloudAttendance check-in kiosk
Badge in or clock in on a wall unit — logged on-site, no per-seat licensing.
Replaces Zenefits / DeputyNFC / QR access control panel
Door and gate access on a standalone panel — no monthly per-door platform fee.
Replaces Kisi / BrivoVisitor management + badge unit
Front-desk check-in and badge printing that runs whether or not the cloud is up.
Replaces Envoy / iLobbyInventory / asset tracker
Scan-and-log tracking for tools and stock, stored locally, exported when you want.
Replaces SortlyLocal data logger
Plant-floor logging and display on hardware you own, not a per-tag cloud subscription.
Replaces cloud SCADA / monitoring subscriptionsPredictive maintenance logger
Vibration and temperature logging on-machine, alerting locally before failure.
Replaces Augury / Fluke ConnectModbus / MQTT gateway
Protocol bridging on-premise, so machine data never has to leave the building.
Replaces cloud IIoT platformsLocal DNS ad-blocker box
Network-wide ad blocking that runs on your LAN, with nothing phoning home.
Replaces cloud DNS / ad-block servicesLocal-only switch hub
Smart switching that keeps working with no app account and no premium tier.
Replaces subscription smart-home appsLocal automation hub
A local hub for the automations you already run, with no cloud hub subscription.
Replaces SmartThings / cloud hub subscriptionsDoorbell / camera, on-device storage
Video stored on the device itself — no cloud storage plan required to review footage.
Replaces Ring / Nest cloud videoDesk task / habit tracker
A dedicated desk device for tracking tasks and habits, off your phone, off the cloud.
Replaces Notion / Todoist subscriptionsStandalone alert / watchdog unit
Watches one thing — temperature, power, a machine — and alerts you locally when it changes.
Replaces uptime / alerting SaaSWant to buy something today? Boards, adapters and accessories are in stock now.
Go to the shopRent software or own the hardware?
For certain jobs, hardware ownership can make more economic and practical sense than a subscription. Here's the honest comparison.
| Factor | Subscription software | CktHub hardware |
|---|---|---|
| Initial cost | Low | One-time purchase |
| Monthly fee | Yes | No |
| Internet dependency | Often | Designed for local operation |
| Data | Cloud dependent | Device / local |
| Ownership | Software access | Physical device |
| Long-term cost | Recurring | One-time hardware purchase |
We're not against software — we build with it every day. This table just shows where the economics of a monthly bill stop making sense for a job a box can do.
No recurring bill
Buy the hardware once. The invoice stops at the payment — no renewal, no price hike.
Works locally
The device keeps doing its job without depending on a cloud service, wherever the architecture allows it.
Your data stays local
Data lives on the device or your local network. Nothing to scrape, sell or hand over.
Predictable cost
No surprise subscription increases. What you paid is what it costs.
Long-term ownership
You own the physical device. It outlasts any vendor's pricing page.
Built for one job
Instead of paying for a large software platform, get hardware designed around the actual task.
Built from the board up.
We don't just sell modules. Every product goes through the full chain in-house: concept, circuit design, PCB, SMT assembly, firmware, enclosure, testing. One facility, one team, end to end.
Product concept
We start from the job — the subscription function — and work out what the box needs to do.
Circuit design
Schematic, power tree, and the exact sensor / display / I/O the job requires.
PCB layout
Compact layout — our DevKit boards fit in 48 × 28 mm, charger and sensing included.
SMT assembly
Pick-and-place and reflow at our Pune facility. In-house means we control every joint.
Firmware
Flashed before shipping — the device arrives doing its job, not as a bare chip.
Enclosure
Designed for the board, sized for the wall or the desk it will live on.
Testing
Bring-up, functional test and bench validation on every unit before it ships.
Finished hardware
Assembled, tested, packaged — and ready to outlive the subscription it replaces.
One partner. Complete electronics development.
Hardware that does the job — buy it now.
These are the building blocks every CktHub product is made from, in stock and shipped from Pune. Each one is subscription-free and works offline. Checkout is on WhatsApp, payment by UPI QR or bank transfer.
Boards the core of your standalone device
Adapters stack straight onto the boards
Accessories built to go with the boards
Volume pricing the same tiers we quote for bulk
ESP32-WROVER-DevKit-Lipo
ESP32-S3-DevKit-Lipo
Volume tiers: 5+ units −4% · 25+ units −10% · 100+ units −18%. The slider above mirrors the same tiers we quote for bulk.
Have a software subscription you'd rather own?
Tell us the job. We'll explore whether it can become a box. Software name, what you use it for, what it costs you, how many devices — send it over and we'll tell you honestly whether hardware makes sense for it.
Need hardware for your own product?
ESP32 and ESP32-S3 design, custom PCBs, embedded firmware, local web interfaces, sensors, displays, connectivity, enclosures and small-batch production — the same team that builds our own products will build yours.
A real company, real hardware, no vague promises.
Here's exactly who operates CktHub, where things are built, and how warranty, shipping and returns work.
Who we are
CktHub is a brand of Ambivert Technologies Private Limited — an Indian electronics company. Products are designed and assembled in-house in Pune; firmware is written and flashed by the same team.
Where things are made
- Designed: Pune, Maharashtra
- Assembled (SMT): Pune, Maharashtra
- Tested: bench-tested on every unit before shipping
- Materials: RoHS-compliant
Warranty, shipping & returns
- Warranty: 12 months against manufacturing defects
- Dispatch: 1–2 working days after order confirmation
- Shipping: couriered pan-India; freight quoted by weight and PIN code at checkout
- Returns: 7 days from delivery for DOA / wrong item
Contact
Do your devices need the internet?
No. The products are designed for local operation — data stays on the device or your network. Internet is optional, and only where a specific feature genuinely needs it.
How do I pay?
Order on WhatsApp, then pay by UPI QR (9960160016@superyes) for orders up to ₹1,00,000, or by bank transfer with UTR for larger orders. GST invoice included.
Can you build a custom device for my business?
Yes. That's the core of what we do — tell us the job you're paying a subscription for and we'll assess whether hardware can do it. Start from the Tell Us What You Want to Replace page or the Build Your Own page.
Do you ship outside India?
Currently shipping within India. For bulk or international orders, message us on WhatsApp and we'll work out the logistics.