it's time for your second brain.
it's time for your second brain.
a sidekick that sees what you see, thinks how you think and acts how you act.

youspend4-7hoursadaypouringyourlifeontoyourphone,yetyourcurrentAIisblind,dumbandstuckinabox:(
youspend4-7hoursadaypouringyourlifeontoyourphone,yetyourcurrentAIisblind,dumbandstuckinabox:(
ChatFish 5
Ask “anything”

youspend4-7hoursadaypouringyourlifeontoyourphone,yetyourcurrentAIisblind,dumbandstuckinabox:(
ChatFish 5
Ask “anything”
it's blind to your world.
your calendar knows you're meeting 'sarah.' your notes have the details. but your "smart" tool can't see any of it.

hey! are we meeting tomorrow??
Wednesday 7 September

Gmail
15m ago
This is not an important email.
it's blind to your world.
your calendar knows you're meeting 'sarah.' your notes have the details. but your "smart" tool can't see any of it.

hey! are we meeting tomorrow??
Wednesday 7 September

Gmail
15m ago
This is not an important email.
but…
there is hope!
but…
there is hope!
secondly,theproactivesidekickyou’vebeenmissing
secondly,theproactivesidekickyou’vebeenmissing
secondly,theproactivesidekickyou’vebeenmissing




































it sees what you see.
secondly can see your screen, proactively jumping in with context right when you need it.
it thinks how you think.
it learns your voice and context, so you can chat with it like a real partner, offline or on.
Ariel wants
5 kids
Ariel loves roses
meeting Helena
send Yossi the files
remind
mom about Friday
follow up with Adam
mom
mom
it thinks how you think.
it learns your voice and context, so you can chat with it like a real partner, offline or on.
Ariel wants
5 kids
Ariel loves roses
meeting Helena
send Yossi the files
remind
mom about Friday
follow up with Adam
mom
mom
oh, and it is yours.
secondly isn't a tool you rent, it's a clone of your mind that you own.
what you see

what we see

boot up your second brain, so you can finally be in two places at once.
boot up your second brain, so you can finally be in two places at once.
boot up your second brain, so you can finally be in two places at once.



faq
faq
faq
Is this just another ChatGPT wrapper?
No. ChatGPT can't access your tabs, fill forms, or run automations. We're a full browser replacement that happens to use AI. Think Cursor, not VSCode.
Do I need to learn commands or prompts?
Zero learning curve. Just browse normally. Dafdef learns your patterns and suggests automations. The more you use it, the smarter it gets.
Can I use the AI key without the dafdef browser?
Not right now. You need to have the browser installed so we can route the LLM requests of the Key.
Is my data private?
Yes. Your browsing data stays on your device. We only process what you explicitly ask the AI to handle. No creepy tracking.
Why iPhone only?
We're mobile-native, not a desktop port. 21% of Gen Z doesn't even own a laptop. We're building for the future, not the past.
Is this just another ChatGPT wrapper?
Do I need to learn commands or prompts?
Can I use the AI key without the dafdef browser?
Is my data private?
Why iPhone only?
Is this just another ChatGPT wrapper?
No. ChatGPT can't access your tabs, fill forms, or run automations. We're a full browser replacement that happens to use AI. Think Cursor, not VSCode.
Do I need to learn commands or prompts?
Zero learning curve. Just browse normally. Dafdef learns your patterns and suggests automations. The more you use it, the smarter it gets.
Can I use the AI key without the dafdef browser?
Not right now. You need to have the browser installed so we can route the LLM requests of the Key.
Is my data private?
Yes. Your browsing data stays on your device. We only process what you explicitly ask the AI to handle. No creepy tracking.
Why iPhone only?
We're mobile-native, not a desktop port. 21% of Gen Z doesn't even own a laptop. We're building for the future, not the past.