Side-by-side comparison · AI Assistants & LLMs
Duck.ai vs Qwen Chat vs Z.ai
Everything that matters when choosing between them, in one place: our rating, what each can do, what they cost, and the trade-offs.
Comparing 3 tools, the maximum.
At a glance
Pick it if: Anyone who wants quick AI help without an account or a record of what they asked.
Pick it if: Anyone after a capable free assistant with image, video, slides and website tools, and developers who want open models.
Pick it if: Developers who want a cheaper engine for Claude Code and similar tools, and anyone who wants free access to a top open model.
Overview
| Attribute | Duck.ai | Qwen Chat | Z.ai |
|---|---|---|---|
| In one line | DuckDuckGo's private AI chat: no account, no stored prompts, free to use. | Alibaba's generous free assistant for research, slides, websites, images and video. | Free chat with Zhipu's open GLM models, plus a cheap coding plan for Claude Code users. |
| Pricing model | Freemium | Freemium | Freemium |
| Starting price | $9.99/mo or $99.99/yr | $4/mo | $18/mo or $12.60/mo |
| Free plan | Yes | Yes | Yes |
| Works with Claude Code | No | No | No |
Rating breakdown
Our scores out of 5. The higher bar in each row is highlighted.
| Attribute | Duck.ai | Qwen Chat | Z.ai |
|---|---|---|---|
| Overall rating | 4.0 | 4.0 | 3.5 |
| Ease of useHow quickly someone non-technical gets value from it. | 4.5 | 4.0 | 3.5 |
| FeaturesHow completely it covers its own job, and how well the pieces fit together. | 3.0 | 4.0 | 3.5 |
| Output qualityHow good the results are before you fix them. | 3.5 | 4.0 | 4.0 |
| Value for moneyWhat you get for the price, including the free plan. | 4.5 | 4.5 | 3.5 |
| Speed & reliabilityHow fast it is and how often it falls over. | 4.5 | 3.5 | 3.0 |
Feature comparison
A tick means it does this today. A dash means we haven't checked.
| Attribute | Duck.ai | Qwen Chat | Z.ai |
|---|---|---|---|
| Access & platform | |||
| Free plan | Yes | Yes | Yes |
| Mobile app | Yes | Yes | No |
| Desktop app | Yes | No | No |
| Browser extension | Yes | No | No |
| API access | No | Yes | Yes |
| Teams & business | |||
| Team workspace | No | No | Yes |
| Enterprise plan or SSO | No | No | No |
| Connects to other apps | No | No | No |
| Open source or self-hosted | No | Yes | Yes |
| AI abilities | |||
| Works with your files | Yes | Yes | Yes |
| Understands images | Yes | Yes | Yes |
| Makes images | Yes | Yes | No |
| Makes video | No | Yes | No |
| Writes code | Yes | Yes | Yes |
| Runs agents or automations | No | Yes | Yes |
| Learns your brand or style | No | No | No |
| Works in many languages | Yes | Yes | Yes |
| Capabilities score | 9/ 17 | 11/ 17 | 9/ 17 |
Pricing
Plans as listed on each vendor's site when we last checked. Confirm before you buy.
| Attribute | Duck.ai | Qwen Chat | Z.ai |
|---|---|---|---|
| Plans | FreeOur pick Free Quick private questions with no sign-up. | FreeOur pick Free Most people. The free limits are generous for chat and research. | Chat Free Anyone who wants to try GLM or use Agent mode. |
Plus $9.99/mo or $99.99/yr Regular users who also want a VPN. | Go $4/mo Regular users who want higher chat limits. | Coding Plan LiteOur pick $18/mo or $12.60/mo billed yearly Developers trying GLM inside their coding tool. | |
Pro $19.99/mo or $199.99/yr People who want the top models privately. | Plus $19/mo Creators making images and video most days. | Coding Plan Pro $80/mo or $56/mo billed yearly Daily agentic coding. | |
Pro $99/mo Heavy video and image users who need priority. | Coding Plan Max $168/mo or $117.60/mo billed yearly Developers running agents for hours every day. | ||
| Which plan to pick | Stay on Free unless you also want a VPN. Plus is good value if you'd pay for a VPN anyway. Pro is $19.99, the same as ChatGPT Plus or Claude Pro, so only pick it if anonymity matters more to you than features. | Start free; most people never need to pay. Go at $4 is cheap if you hit the chat limits. Prices are App Store prices, so check the in-app screen before you subscribe. | For chat, it's free. Developers should start with Coding Plan Lite and code off-peak, because usage between 2pm and 6pm Singapore time on weekdays costs more credits. Move to Pro only if you hit the weekly cap. |
Key features
Pros and cons
| Attribute | Duck.ai | Qwen Chat | Z.ai |
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Who each one is for
| Attribute | Duck.ai | Qwen Chat | Z.ai |
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Questions people ask
Which is better, Duck.ai, Qwen Chat or Z.ai?
They tie on our overall rating (Duck.ai 4.0/5, Qwen Chat 4.0/5 and Z.ai 3.5/5). Duck.ai is best for quick private questions and Using AI without signing up. Qwen Chat is best for A free assistant that does a bit of everything and quick webpages and slide decks from a prompt. Z.ai is best for cheaper agentic coding in Claude Code or OpenCode and free chat with a top open model.
Which is cheaper, Duck.ai, Qwen Chat or Z.ai?
Duck.ai: There's a free plan, and paid plans start at $9.99/mo or $99.99/yr. Qwen Chat: There's a free plan, and paid plans start at $4/mo. Z.ai: There's a free plan, and paid plans start at $18/mo or $12.60/mo.
Which is easier to use, Duck.ai, Qwen Chat or Z.ai?
Duck.ai rates highest for ease of use in our scores. Anyone who wants quick AI help without an account or a record of what they asked.
How we compare
Ratings are our own, from using each tool, across ease of use, features, output quality, value for money, speed & reliability.
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