Where to Buy SO100 Robot Arm in 2026 — Price Comparison & Buying Guide

Looking to buy the SO100 robot arm? This guide compares every seller, price, and option so you can find the best deal with the fastest shipping.

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Where Can You Buy the SO100 Robot Arm?

The SO100 (SO-ARM100) is one of the most popular open-source robot arms in the world, designed by The Robot Studio and Hugging Face for AI and robotics development. Because it's open-source, multiple sellers offer it in different configurations.

Here's every place you can buy an SO100 robot arm in 2026:

1. so100.nanocorp.app — US-based, pre-assembled complete kit
2. AliExpress / Seeed Studio — Electronics kit (no 3D-printed parts)
3. PartaBot — US-based DIY electronics kit
4. AIFITLAB — Multiple tiers from DIY to assembled
5. eBay — Assembled units from Chinese sellers
6. WowRobo — International, DIY and assembled (often sold out)

Let's break down each option.

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SO100 Price Comparison Table (2026)

Seller	Price	What's Included	Shipping	Delivery Time
so100.nanocorp.app	$199	Pre-assembled leader + follower arms, all servos, boards, cables, power supply	US-based	3–5 days
Seeed Studio / AliExpress	~$220	Electronics kit only (servos, boards, cables — NO 3D-printed parts)	China	2–4 weeks
PartaBot	~$230	Electronics kit (12 servos, 2 boards, cables, screwdriver set — NO 3D-printed parts)	US-based	5–7 days
AIFITLAB	$269–$419+	Multiple tiers: DIY builder, complete component kit, or pre-assembled bundle	Varies	1–3 weeks
eBay (assembled)	$590–$625	Fully assembled 1 leader + 1 follower arm, tested	China	2–4 weeks
WowRobo	~$200–$400	DIY kit or assembled (frequently sold out)	China	2–4 weeks

Bottom line: The cheapest complete, ready-to-use SO100 is $199 from so100.nanocorp.app — and it ships from the US.

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Detailed Seller Breakdown

1. so100.nanocorp.app — Best Overall Value (US)

Price: $199 (launch special, normally $299)

so100.nanocorp.app is a US-based seller offering the SO100 Complete Kit — the most affordable pre-assembled option available.

What's included:

• 1 pre-assembled leader arm
• 1 pre-assembled follower arm
• 12 STS3215 bus servos (pre-installed)
• 2 Waveshare servo driver boards
• 2 USB-C cables
• 1 power supply
• All cables and connectors

Pros:

• ✅ Cheapest pre-assembled kit available ($199)
• ✅ Ships from the US — 3–5 day delivery
• ✅ Fully tested before shipping
• ✅ Email support included
• ✅ No 3D printer needed
• ✅ Ready to use with LeRobot out of the box

Cons:

• ❌ Only ships to the US (for now)

Best for: Anyone in the US who wants the fastest path from purchase to training AI models. If you want to skip assembly and start building AI robotics projects this weekend, this is your best option.

Get the SO100 Complete Kit — $199 →

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2. AliExpress / Seeed Studio — Cheapest Electronics Kit

Price: ~$220

Seeed Studio sells the SO100 electronics kit through their own store and AliExpress. This is an electronics-only kit — you'll need to 3D-print the structural parts yourself.

What's included:

• 12 STS3215 bus servos
• 2 Waveshare servo driver boards
• USB cables and connectors

What's NOT included:

• ❌ 3D-printed structural parts (arms, mounts, grippers)
• ❌ Assembly or calibration

Pros:

• ✅ Low price for the electronics
• ✅ Seeed Studio is a reputable supplier
• ✅ Good if you already have a 3D printer

Cons:

• ❌ No 3D-printed parts — you need your own printer (or pay a print service ~$50–$100)
• ❌ Ships from China — 2–4 week delivery
• ❌ Assembly takes 4–8 hours
• ❌ No dedicated support
• ❌ Total cost with 3D printing may exceed $199

Best for: Makers who already have a 3D printer and enjoy the build process. Check out our pre-assembled vs DIY comparison for more on this trade-off.

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3. PartaBot — US-Based DIY Kit

Price: ~$230

PartaBot is a US-based seller officially listed on the SO-ARM100 GitHub repository as an authorized supplier. They sell a DIY electronics kit.

What's included:

• 12 STS3215 Feetech servos
• 2 servo driver boards
• 2 USB-A to USB-C cables + adapters
• 1 screwdriver set

What's NOT included:

• ❌ 3D-printed parts
• ❌ Assembly

Pros:

• ✅ Ships from the US — faster than China sellers
• ✅ Official supplier listed on the SO-ARM100 GitHub repo
• ✅ Includes a screwdriver set

Cons:

• ❌ More expensive than Seeed Studio for the same electronics
• ❌ Still requires 3D printing and assembly
• ❌ No pre-assembled option

Best for: US-based makers who want US shipping but plan to 3D print and assemble themselves.

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4. AIFITLAB — Multiple Tiers

Price: $269–$419+

AIFITLAB offers the SO100 in multiple configurations:

• Core DIY Builder Kit (~$269) — 3D-printed parts + servos
• Complete Component Kit (~$350) — All mechanical and electronic parts
• Pre-Assembled Pro Bundle (~$419+) — Fully built with tech support

Pros:

• ✅ Multiple options for different budgets
• ✅ Pre-assembled option available
• ✅ Technical support included with Pro bundle
• ✅ Assembly guides on their blog

Cons:

• ❌ Significantly more expensive than so100.nanocorp.app
• ❌ Frequently backordered
• ❌ Shipping times vary

Best for: Buyers who want a tiered option and don't mind paying more for included support documentation.

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5. eBay — Assembled from China

Price: $590–$625

Several Chinese sellers on eBay offer fully assembled SO100 dual-arm sets (1 leader + 1 follower arm). These are tested before shipping.

Pros:

• ✅ Fully assembled and tested
• ✅ eBay buyer protection

Cons:

• ❌ 3x the price of so100.nanocorp.app for the same thing
• ❌ Ships from Shenzhen, China — 2–4 week delivery
• ❌ $25–$30 shipping on top of the high price
• ❌ Returns are difficult (ship back to China)
• ❌ No dedicated robotics support

Best for: Not recommended unless other options are sold out. You're paying 3x more for essentially the same pre-assembled product.

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6. WowRobo — International

Price: ~$200–$400

WowRobo is an international supplier listed on the official SO-ARM100 GitHub. They offer both DIY and assembled versions.

Pros:

• ✅ Official supplier
• ✅ Assembled option available

Cons:

• ❌ Frequently sold out — most variants show as unavailable
• ❌ Ships from China
• ❌ Inconsistent availability

Best for: International buyers when stock is available.

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Which SO100 Seller Should You Choose?

Here's a quick decision guide:

If you're in the US and want the fastest, cheapest path to a working SO100: → so100.nanocorp.app — $199, pre-assembled, ships in 3–5 days

If you have a 3D printer and want to save money on electronics: → Seeed Studio / AliExpress — ~$220 electronics kit, print the rest yourself

If you want a US-shipped DIY kit: → PartaBot — ~$230 electronics kit, ships from the US

If budget doesn't matter and you want premium support: → AIFITLAB Pro Bundle — ~$419+, fully assembled with tech support

If all other options are sold out: → eBay — $590+, assembled, ships from China

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Hidden Costs to Watch Out For

When comparing SO100 prices, don't just look at the sticker price. Factor in these hidden costs:

3D Printing Costs

If you buy an electronics-only kit (Seeed Studio, PartaBot), you need 3D-printed parts. Options:

• Own printer: ~$5–$10 in filament (but you need an FDM printer capable of PETG or PLA)
• Print service (Craftcloud, PCBWay): $50–$100+ depending on material and provider
• Local makerspace: $20–$50 (if available)

Assembly Time

DIY assembly takes 4–8 hours for the full leader + follower arm setup. That includes printing (8–12 hours of print time), servo installation, wiring, and calibration. If your time is worth anything, the pre-assembled option saves a full weekend.

Shipping

• US sellers (so100.nanocorp.app, PartaBot): Standard shipping, 3–7 days
• China sellers (AliExpress, eBay, WowRobo): 2–4 weeks, plus potential customs delays
• Import duties: Orders from China over $800 may incur customs fees (usually not an issue at these price points)

Total Cost Comparison (US Buyer)

Route	Electronics	3D Printing	Assembly Time	Total Cost
so100.nanocorp.app (pre-assembled)	Included	Included	0 hours	$199
Seeed Studio + own printer	$220	~$10	6–8 hours	~$230 + your time
Seeed Studio + print service	$220	~$75	6–8 hours	~$295 + your time
PartaBot + own printer	$230	~$10	6–8 hours	~$240 + your time
AIFITLAB assembled	$419+	Included	0 hours	$419+
eBay assembled	$590–$625	Included	0 hours	$620+

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What to Look for When Buying an SO100

Not all SO100 listings are equal. Here's what to check:

Servo Quality

The SO100 uses STS3215 bus servos. Make sure your kit includes genuine Feetech STS3215 servos — some cheap clones have lower torque and shorter lifespans. All sellers listed in this guide use genuine servos.

Dual Arm Configuration

For imitation learning and AI training, you need two arms — a leader arm (for demonstrations) and a follower arm (for execution). Make sure your kit includes both. Single-arm kits exist but are limited in functionality.

LeRobot Compatibility

The whole point of the SO100 is to use it with LeRobot. Verify the kit is compatible. All sellers listed in this guide sell LeRobot-compatible SO100 kits. Read our LeRobot setup tutorial to see the full setup process.

Warranty and Support

• so100.nanocorp.app: Email support, US-based
• Seeed Studio: Standard retail warranty
• PartaBot: US-based support
• AIFITLAB: Tech support with Pro bundle
• eBay: eBay buyer protection only
• WowRobo: Limited support

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Frequently Asked Questions

Where is the cheapest place to buy an SO100 robot arm?

The cheapest complete, ready-to-use SO100 is $199 from so100.nanocorp.app. If you have a 3D printer and want electronics only, Seeed Studio on AliExpress offers kits starting at ~$220.

How much does a fully assembled SO100 cost?

Pre-assembled SO100 kits range from $199 (so100.nanocorp.app) to $625 (eBay). The most affordable assembled option is so100.nanocorp.app at $199.

Can I buy the SO100 in the US?

Yes. so100.nanocorp.app and PartaBot both ship from the US. so100.nanocorp.app offers pre-assembled kits ($199) with 3–5 day delivery. PartaBot sells electronics-only DIY kits (~$230).

Is the SO100 worth $199?

Absolutely. The SO100 is the most affordable 6-DOF robot arm with native AI and machine learning support. Comparable robot arms cost $500–$2,000+. At $199 for a pre-assembled dual-arm kit, it's exceptional value. Read our full SO100 review and buyer's guide for more details.

What do I need besides the SO100 kit?

You need a computer (Windows, Mac, or Linux) with a USB port and Python 3.10+ installed. That's it. The pre-assembled kit from so100.nanocorp.app includes everything else — arms, servos, boards, cables, and power supply. Check out our complete guide for full details.

How long does assembly take if I buy a DIY kit?

Plan for 4–8 hours of assembly time for the leader + follower arm setup. This doesn't include 3D printing time (8–12 hours). If you want to skip assembly entirely, buy the pre-assembled kit from so100.nanocorp.app.

SO100 vs SO101 — which should I buy?

The SO100 and SO101 are very similar. The SO101 has minor mechanical improvements (easier assembly, slightly updated motors) but runs the same LeRobot software. The SO100 has a larger community and more tutorials available. Both are great choices.

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Ready to Buy?

If you've read this far, you know the SO100 is the right robot arm for your project. Here's our recommendation:

For US buyers: Get the pre-assembled SO100 Complete Kit from so100.nanocorp.app for $199. It's the cheapest assembled option, ships from the US in 3–5 days, and comes ready to use with LeRobot.

Get the SO100 Complete Kit — $199 (Launch Special) →

Not sure if the SO100 is right for you? Read our in-depth review, buyer's guide, or learn how to build a robot arm from scratch.