How we compared them
We own neither product and we do not run a test lab, so nothing here is a measurement of ours. What this page compares is four things you can check from the published listings and from how each device has to be set up — which, for this category, is the whole decision.
1. Does it record on its own? The single most consequential difference, and the one most buyers do not realize until the box is open.
2. What does recording cost per month?Tablo publishes “No Subscriptions” in its listing title. SiliconDust states nothing about a bundled subscription for the Flex tuners, which is why our registry leaves that field unresolved rather than filling it in — the honest answer is that your ongoing cost depends on the DVR software you pair it with.
3. How many tuners, and do you need more?Tuner count is how many things the box can do at once — watching one channel and recording another is two tuners, not one.
4. Which broadcast standard does it decode?This is the quiet one. The Flex Duo’s listing says “ATSC” without a 3.0 qualifier, which means ATSC 1.0. The Flex 4K publishes ATSC 3.0 and 1.0. Tablo’s listings do not claim ATSC 3.0.
The four models, side by side
Read from each Amazon listing on the dated visit recorded against that product. “Not published” means the maker does not state it — on this page that gap is itself the story, because the recording model differs between the two brands.| Model | Tuners | Records on its own | Subscription | Antenna included (published) | Setup |
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| Tablo 4th Gen 2-Tuner OTA DVR | 2 | Yes | Not required | Yes | Simple |
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| SiliconDust HDHomeRun Flex Duo | 2 (ATSC 1.0) | No - needs DVR software | Not published | Not published | Simple |
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| Tablo 4th Gen 4-Tuner OTA DVR | 4 | Yes | Not required | Yes | Simple |
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| SiliconDust HDHomeRun Flex 4K | 2/4 as listed | No - needs DVR software | Not published | Not published | Simple |
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Connection, for all four: Coax antenna in, Ethernet and Wi-Fi out to the network on the Tablos, Coax antenna in, Ethernet to the network on the HDHomeRuns.
Two columns carry most of the weight. “Records on its own” separates the brands completely, and it is a design philosophy rather than a feature gap. And the subscription column shows one brand making an explicit promise in its product title while the other simply does not address it — which is a fair reflection of what each company thinks it is selling you.
What Tablo actually is
A small box that sits by your router. Coax from the antenna goes in; the recordings come out over your network to apps on the streaming devices you already own. It has its own program guide and its own interface, and both work the same way for everyone who buys one.
The things that make it the default recommendation on this site:
No subscription, stated in the listing title. This matters more here than it would anywhere else. You are reading this because you cancelled a monthly bill; a DVR that reinstates one defeats the exercise.
An antenna comes in the box, which makes it a complete first purchase rather than the first of two. Be realistic about what that antenna is, though — it is a starter antenna, and if your address needs an outdoor or attic install it will not substitute for one. Check what your address can actually receive before assuming the bundled antenna is enough.
It streams to phones and tablets on your network, so the recordings are not trapped on one television.
And the honest costs. Two tuners means two things at once and no more. You are also accepting Tablo’s interface and Tablo’s guide — if the company changes either, you live with it, which is the standing trade in any appliance. And nothing in Tablo’s listings claims ATSC 3.0, so this is a bet on ATSC 1.0 remaining the working standard in your market for the life of the box.
What HDHomeRun actually is
A tuner with a network port. It takes the antenna feed, decodes it, and makes the channels available to every device on your LAN as streams. That is the entire function.
It does not record anything by itself. If you plug one in expecting a DVR, you will be disappointed, and that is not a defect — it is the product. Recording means running Plex, Channels, Emby or similar, on a machine that stays on, with storage you provide.
For the household that already has that machine, the advantages are real:
Live TV appears inside software you already use. If your family already opens Plex to watch things, broadcast channels arriving in the same interface is worth more than any feature on the Tablo.
You are not locked into one company’s app. Change DVR software later and the tuner keeps working.
Every device on the network can watch, including computers and tablets, without a dedicated app from the hardware maker.
The costs are equally real. There is a server to maintain. Your DVR software may charge its own fee — and because SiliconDust does not address that in the listing, we do not state a figure for it. And the Flex Duo is ATSC 1.0 only; the ATSC 3.0 version costs roughly twice as much, which is only worth paying if your market already carries NextGen TV.
Which one for which house
You want to record the news, the game and a couple of shows, with no fee. Tablo 4th Gen 2-Tuner. This is most people, and it is why it leads this page.
More than two people watch different live things at once. Tablo 4th Gen 4-Tuner. The price gap between the two Tablos is small enough that the two-tuner model really only wins in a one- or two-person household, and sports seasons with overlapping games are exactly where four tuners earn the difference.
There is already a Plex or Channels server in the house. HDHomeRun Flex Duo. You have the hard part built; the tuner is the cheap missing piece, and putting broadcast TV inside the interface your household already knows beats any standalone app.
Your market broadcasts ATSC 3.0 and you want it.HDHomeRun Flex 4K, which publishes both standards. Check that your market actually carries NextGen TV first — paying twice the price for a standard your stations have not launched is the most common way to waste money in this category.
You are not sure whether you will keep up a server.Tablo. Be honest about this one: “I will set up Plex” is a plan, and a box that needs a plan to become useful often stays in the cupboard.
What both of them need, and nobody mentions
An antenna that actually receives the channels you want. Neither box improves reception — they decode what arrives and nothing more, so a weak signal is a weak recording.
Start with the FCC’s address-level reception tool, which tells you which stations are predicted at your street address and how strong each one should be. That answer picks your antenna, which is the part of this purchase that actually determines whether you are happy. Our guides to indoor antennas and outdoor antennas sort the options by what your address needs rather than by the mile figure on the box.
Two practical notes. Both devices want a wired network connection where you can give them one — recording and streaming several channels at once is a steady load, and that is exactly the job a cable does better than Wi-Fi. In a house that used to have cable TV, the coax already in the walls will carry Ethernet with a pair of adapters, which is usually easier than running new cable to the shelf by the router. And if a channel you expected is missing after setup, that is an antenna or a scan problem rather than a DVR problem — running the scan correctly is the first thing to check.
The short version
Tablo if you want a DVR. HDHomeRun if you want a tuner for a system you already run. Neither is a compromise of the other, and the common mistake is buying the component when you wanted the appliance.
If you are earlier in this decision than brand-versus-brand, our OTA DVR roundup ranks the whole category and the no-subscription page re-sorts it by the one thing a cord-cutter cares about most.
