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Capture real-time, in-depth insights

Navigate the complexities of diary studies effortlessly with Yazi's unique WhatsApp-based platform, designed for high engagement and rich data collection.

  • 2-5x Faster Response Rate
  • Capture MP3, MP4, Images and more from your respondents

Diary study product features

Discover Our Core Survey Features. Work Smarter With Easy Access For Every Users..

Logic Flow Editing

Employ logic flow editing to create a diary study where participants' entries shape subsequent prompts, capturing evolving thoughts over time. This responsive method enhances engagement, allowing deeper exploration into expressed emotions or events for a richer, more personalized diary experience.

Image Capturing

Using the image capture feature, participants document daily experiences, moods, and activities with photos. This visual diary effectively captures moments like ambiance and emotions that words can't fully express, providing a vivid, pictorial narrative of their lives and offering unique insights.

Video Capture

Participants can use video capture to create daily or weekly video logs, capturing both verbal reflections and non-verbal cues like facial expressions and tone. These logs are dynamic and engaging, ideal for documenting and understanding emotional journeys, lifestyle changes, or user experiences.

Voice Note/Audio Recording

Utilising voice note/audio recording, participants record daily reflections and thoughts, offering inclusivity for those preferring speech over writing. This method enriches linguistic or ethnographic studies, providing authentic insights into language use, expressions, and cultural nuances.

Run successful diary studies

Dive deep into user experiences and behaviours over time with our advanced features tailored for diary studies.

Ethical and secure paticipant onboarding

We help you start your study on ethical grounds by streamlining the process of informed consent.

  • disseminate and collect digitally signed informed consent forms
  • Provide participants with all necessary study information in a format they can easily understand, courtesy of Yazi's multi-language capabilities.
  • all consent forms and participant data are stored securely on Yazi's platform.

Seamlessly Roll out your study

Initiating your study is as easy as pushing a button. We take care of the distribution, engagement and data collection.

  • Send trigger notifications to your participants.
  • Prompt participants to complete tasks or re-do if low-quality
  • Easy Access: Since your study is going to be distributed via WhatsApp most people in emerging markets will be able to participate
  • The low data costs associated with WhatsApp make it highly accessible, breaking down financial barriers to participation over a longer period of time.

Keep your study on track

Stay in the loop constantly and make data driven tweaks to your diary study.

  • Monitor incoming diary entries in real-time, ensuring data completeness and quality
  • Automated reminders and incentive features like vouchers and discounts to maintain high levels of participation.
  • If early entries reveal the need for adjustments, you can make real-time modifications to the study design.

Don’t Take Our Words For It - Listen To Our Clients

Discover why leading agencies and researchers trust Yazi for their data collection needs. Hear directly from our satisfied clients who've experienced the transformative power of our platform.

Nathan Mengel

Lead Venture Manager, The Delta

"Yazi's targeted approach was essential in validating our concept for a project aimed at SMEs. Their efficient data collection and ability to access the right market segment provided us with the crucial insights needed to validate and refine our product strategy, especially in understanding operational, pricing, and competitive dynamics."

Marichen Herholdt

Product Designer, Byte Orbit

"Yazi was a game-changer for us! It helped us connect with a typically hard-to-reach audience via WhatsApp, opening up a whole new segment for our research. It was quick, cost-effective, and highly personalised. We received our results in less than 24 hours! Yazi saved us loads of time and empowered us with valuable insights to make informed product development decisions based on a deeper understanding of our audience."

Oliver Latouf

UX Researcher, Olympus Bank @Old Mutual

"Yazi's WhatsApp platform has been such an amazing resource for our team to utilise. It granted us swift and direct access to our target market, significantly enhancing our product development process. Tim from the Yazi team was particularly helpful, offering guidance on question design and research methodology. Thanks to Yazi, we were able to refine our marketing strategy, positioning, and communication effectively."

Rowan Clarke

PhD Candidate, Harvard Business School

"Working with Yazi, and particularly with Tim, showcased the platform's remarkable flexibility and problem-solving prowess. Tim's foresight and ability to anticipate our project needs were exceptional. Yazi's adaptability was key in managing the dynamic demands of academic research, proving invaluable in my studies."

Discover Our other Use Cases

Qualitative Research

Use Yazi to carry out your Qualitative Research Project with our Image and video and voice note capturing capability.  
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Quantitative Research

Use Yazi to carry out your Quantitative Research Projects with our Yazi Survey product.
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Frequently Asked Question

We have gathered the answers to common queries about how Yazi facilitates revolutionary market research through WhatsApp, alongside a host of other insightful information.


How does Yazi Work?

Yazi is a Market research platform built on top of WhatsApp. You have the ability to script, design, edit, launch and analyse your results on our webapp. The questions are sent via WhatsApp and the participants interact with them there as if it is a normal conversation.


How is Yazi's Data Protection?

Yazi prioritises data privacy by anonymising information, employing robust encryption, and allowing database access only to authorised personnel through password and 2FA protection. We adhere to stringent security standards including ISO/IEC 27001, NIST, PCI SSC, and GDPR, ensuring no data sharing with external third parties. Our comprehensive Data Security Program encapsulates physical and logical security measures, data access controls, encryption, along with data backup, recovery, and a well-structured incident response framework. In adherence to GDPR's principles, we process user data with utmost transparency, and address data deletion requests promptly as delineated in our Terms of Service, providing you with control over your data.


Why WhatsApp

Our WhatsApp surveys boast an impressive response rate of 62%, showcasing superior engagement compared to traditional online surveys, especially valuable in reaching individuals with limited internet access. The low data cost of 10 cents per survey, alongside the prevalent use of WhatsApp in South Africa with a 95% penetration rate, facilitates nationwide representation, reducing financial and phone storage barriers.

The familiar and user-friendly nature of WhatsApp enhances participant comfort, while its pause-resume functionality ensures convenience in survey completion. Moreover, the recent WhatsApp API upgrade enables rich data collection through various media forms without incurring significant data costs, paving the way for nuanced longitudinal studies. This platform's habit-forming nature, reinforced by personal engagement from our researchers, makes it an exemplary channel for continuous and detailed market research.


How is Yazi's data quality?

  • Speeding - A completion time that is too fast indicates the respondent has not sufficiently comprehended the questions.
  • Gibberish checker - Checking that open text answers are not “gibberish” and can be understood as a sentence.
  • Straight-lining checker - Checking that the sequence of answers does not follow the same pattern - e.g. A, A, A, A, A, A
  • Red herring question - Intentionally placing “oddball” questions into the survey to see if the respondent was paying attention. We also ask questions that correspond with previous answers but are categorised or worded slightly differently.
  • Evidence question - Where we specifically need an audience that exhibits a certain behaviour or matches a certain demographic, we ask respondents to send a picture that proves they match/meet requirement.
  • Panel recalibration & assessment - We recycle demographic and behavioural questions every 4 months to compare against historical answers.

What types of Questions do you support? 

Question Types Supported: 

  • Multiple Choice
  • Image
  • Video
  • Voice Notes


  • Grid Questions
  • Ranking Question

How many questions can I ask via WhatsApp?

At Yazi, we employ a multifaceted approach to recruit diverse and reliable survey participants. Our strategies include:

  1. Social Media Engagement: We actively recruit through various social media platforms such as Facebook, Instagram, LinkedIn, Twitter/X, and TikTok. This broad approach helps us reach a wide demographic spectrum.
  2. Partnerships: We collaborate with companies possessing extensive databases of customers or members. Through these partnerships, we invite individuals to participate in our surveys, ensuring a rich pool of respondents.
  3. Local Presence: In an effort to connect with communities, we've placed QR codes in spaza shop locations across South Africa. These QR codes direct individuals to our WhatsApp number, facilitating an easy sign-up process.
  4. Referral Program: We believe in the power of word-of-mouth. Hence, we have a referral program where existing participants can refer friends, family, and their network. We incentivise these referrals to encourage a broader participation.
  5. Demographic Information Collection: To mitigate bias and the incentive to provide untruthful responses, we gather demographic information before showing participants our surveys. This ensures the quality and reliability of our data.